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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPolicies" id="DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>10101 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureAcquisition" id="DisclosureAcquisition">
        <link:definition>10201 - Disclosure - ACQUISITION</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosurePropertyAndEquipment" id="DisclosurePropertyAndEquipment">
        <link:definition>10301 - Disclosure - PROPERTY AND EQUIPMENT</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureCapitalizedSoftware" id="DisclosureCapitalizedSoftware">
        <link:definition>10401 - Disclosure - CAPITALIZED SOFTWARE</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureGoodwill" id="DisclosureGoodwill">
        <link:definition>10501 - Disclosure - GOODWILL</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureDebt" id="DisclosureDebt">
        <link:definition>10601 - Disclosure - DEBT</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureStockholdersEquityDeficit" id="DisclosureStockholdersEquityDeficit">
        <link:definition>10701 - Disclosure - STOCKHOLDERS&#x2019; EQUITY (DEFICIT)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureEarningsPerShare" id="DisclosureEarningsPerShare">
        <link:definition>10801 - Disclosure - EARNINGS PER SHARE</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureEmployeeBenefitAndDeferredCompensationPlans" id="DisclosureEmployeeBenefitAndDeferredCompensationPlans">
        <link:definition>10901 - Disclosure - EMPLOYEE BENEFIT AND DEFERRED COMPENSATION PLANS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureRelatedParties" id="DisclosureRelatedParties">
        <link:definition>11001 - Disclosure - RELATED PARTIES</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>11101 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>20102 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>30103 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureAcquisitionTables" id="DisclosureAcquisitionTables">
        <link:definition>30203 - Disclosure - ACQUISITION (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosurePropertyAndEquipmentTables" id="DisclosurePropertyAndEquipmentTables">
        <link:definition>30303 - Disclosure - PROPERTY AND EQUIPMENT (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureCapitalizedSoftwareTables" id="DisclosureCapitalizedSoftwareTables">
        <link:definition>30403 - Disclosure - CAPITALIZED SOFTWARE (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureGoodwillTables" id="DisclosureGoodwillTables">
        <link:definition>30503 - Disclosure - GOODWILL (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureEarningsPerShareTables" id="DisclosureEarningsPerShareTables">
        <link:definition>30803 - Disclosure - EARNINGS PER SHARE (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesSelfInsuranceDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesSelfInsuranceDetails">
        <link:definition>40106 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Self-insurance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAllowanceAndDeferredAllowanceDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAllowanceAndDeferredAllowanceDetails">
        <link:definition>40110 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance and deferred allowance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDeferredRevenueChangesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesDeferredRevenueChangesDetails">
        <link:definition>40112 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred revenue, changes (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureSummaryOfSignificantAccountingPoliciesContractCostsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesContractCostsDetails">
        <link:definition>40113 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Contract costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>40114 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Payment terms and Unaudited Pro Forma Income Taxes (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>40116 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Disclosures (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>40117 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued Accounting Pronouncements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureGoodwillDetails" id="DisclosureGoodwillDetails">
        <link:definition>40501 - Disclosure - GOODWILL (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.deitaxonomy.com/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>41101 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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  <element id="verx_PercentageOfSharesOutstanding" name="PercentageOfSharesOutstanding" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_AccruedVariableCompensationCurrent" name="AccruedVariableCompensationCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_IncreaseDecreaseInCapitalizedContractCostNetNonCurrent" name="IncreaseDecreaseInCapitalizedContractCostNetNonCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_IncreaseDecreaseInCustomerFundsObligations" name="IncreaseDecreaseInCustomerFundsObligations" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_VestedUnitsMember" name="VestedUnitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_NonVestedUnitsMember" name="NonVestedUnitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TemporaryEquityRemeasurementOfOptionsForRedeemableShares" name="TemporaryEquityRemeasurementOfOptionsForRedeemableShares" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_SharebasedCompensationArrangementBySharebasedPaymentAwardMovementOfNonvestedUnits" name="SharebasedCompensationArrangementBySharebasedPaymentAwardMovementOfNonvestedUnits" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_EarningsPerShareBasicAndDilutedProForma" name="EarningsPerShareBasicAndDilutedProForma" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ProformaNetIncomeLoss" name="ProformaNetIncomeLoss" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ProformaIncomeTaxExpenseBenefit" name="ProformaIncomeTaxExpenseBenefit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_LongLivedAssetsBenchmarkMember" name="LongLivedAssetsBenchmarkMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_NetIncomeLossAvailableToCommonStockholdersOperationsProformaAbstract" name="NetIncomeLossAvailableToCommonStockholdersOperationsProformaAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PercentageOfSharesHeldInTotalSharesOutstanding" name="PercentageOfSharesHeldInTotalSharesOutstanding" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ScheduleOfEarningsPerShareBasicAndDilutedProformaTableTextBlock" name="ScheduleOfEarningsPerShareBasicAndDilutedProformaTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PropertyPlantAndEquipmentExcludingAllInternalUseSoftwareAndCapitalLeasesMember" name="PropertyPlantAndEquipmentExcludingAllInternalUseSoftwareAndCapitalLeasesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_RemeasurementOfOptions" name="RemeasurementOfOptions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_CommonClassBNonVotingMember" name="CommonClassBNonVotingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_CommonClassNonVotingMember" name="CommonClassNonVotingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_NewIssuesVestedRestrictedStock" name="NewIssuesVestedRestrictedStock" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_StockIssuedForAutoExercisedOptionsConnectedWithOfferingValue" name="StockIssuedForAutoExercisedOptionsConnectedWithOfferingValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_AutoExercisedOptionsInConnectionWithOfferingSharesIssued" name="AutoExercisedOptionsInConnectionWithOfferingSharesIssued" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ConversionOfStockAppreciationRights" name="ConversionOfStockAppreciationRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_OfferingExchangeOfOptions" name="OfferingExchangeOfOptions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PaymentOfRedemptionOfConvertedOptionsCost" name="PaymentOfRedemptionOfConvertedOptionsCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PaymentsForTaxesOnOptionExercises" name="PaymentsForTaxesOnOptionExercises" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_AmendedPlanMember" name="AmendedPlanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsVestingPercentageExercisable" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsVestingPercentageExercisable" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValueAbstract" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValueAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsConvertedFairGrantValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsConvertedFairGrantValue" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TriggeringEventThresholdPercentageOfStock" name="TriggeringEventThresholdPercentageOfStock" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PartialTriggeringEventThresholdPercentageOfStock" name="PartialTriggeringEventThresholdPercentageOfStock" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TriggeringEventThresholdTagLogRight" name="TriggeringEventThresholdTagLogRight" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TriggeringEventThresholdDragAlongRight" name="TriggeringEventThresholdDragAlongRight" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestInPeriodFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestInPeriodFairValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_InConnectionWithConvertedOptionsMember" name="InConnectionWithConvertedOptionsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_InConnectionWithAmendedOptionsMember" name="InConnectionWithAmendedOptionsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ExercisePriceRangeOneMember" name="ExercisePriceRangeOneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ExercisePriceRangeTwoMember" name="ExercisePriceRangeTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ExercisePriceRangeThreeMember" name="ExercisePriceRangeThreeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PriceRangeFourMember" name="PriceRangeFourMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PriceRangeFiveMember" name="PriceRangeFiveMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PriceRangeSixMember" name="PriceRangeSixMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PriceRangeSevenMember" name="PriceRangeSevenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_WriteOffDeferredFinancingCosts" name="WriteOffDeferredFinancingCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ExchangesAndNewIssuancesTableTextBlock" name="ExchangesAndNewIssuancesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_CreditOnPaymentsOfDebtIssuanceCosts" name="CreditOnPaymentsOfDebtIssuanceCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_SCorporationMember" name="SCorporationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PercentageOfSharesOutstandingDiluted" name="PercentageOfSharesOutstandingDiluted" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_PaymentsOfDebtIssuanceCostsNet" name="PaymentsOfDebtIssuanceCostsNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ContractWithCustomerLiabilityRevenueRecognizedIncludedOpeningBalancesAndAdditions" name="ContractWithCustomerLiabilityRevenueRecognizedIncludedOpeningBalancesAndAdditions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_OwnershipPercentageRequiredToSettleObligations" name="OwnershipPercentageRequiredToSettleObligations" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_SubsequentToTerminationOfSElectionMember" name="SubsequentToTerminationOfSElectionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_OfferingPeriod" name="OfferingPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TriggeringEventOwnershipPercentage" name="TriggeringEventOwnershipPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_Plan401KMember" name="Plan401KMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_IncreasesDecreaseInValueOfOptionsForRedeemableShares" name="IncreasesDecreaseInValueOfOptionsForRedeemableShares" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_TemporaryEquityReclassificationOfOptionsForRedeemableShares" name="TemporaryEquityReclassificationOfOptionsForRedeemableShares" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExchangedInPeriodIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExchangedInPeriodIntrinsicValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_RegistrationOfCompanyStockAndInitialPublicOffering" name="RegistrationOfCompanyStockAndInitialPublicOffering" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_IncreaseDecreaseInAccountsReceivableNetForeignExchangeRevaluation" name="IncreaseDecreaseInAccountsReceivableNetForeignExchangeRevaluation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="verx_ProceedsFromCommonStockShareExchange" name="ProceedsFromCommonStockShareExchange" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
