Dear @zahid
I asume, your Document level AllowanceCharge is Discount,
Xml should be like this
<?xml version="1.0" encoding="UTF-8"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2">
<cbc:ProfileID>reporting:1.0</cbc:ProfileID>
<cbc:ID>SME00010</cbc:ID>
<cbc:UUID>8e6000cf-1a98-4174-b3e7-b5d5954bc10d</cbc:UUID>
<cbc:IssueDate>2022-08-17</cbc:IssueDate>
<cbc:IssueTime>17:41:08</cbc:IssueTime>
<cbc:InvoiceTypeCode name="0100000">388</cbc:InvoiceTypeCode>
<cbc:Note languageID="ar">ABC</cbc:Note>
<cbc:DocumentCurrencyCode>SAR</cbc:DocumentCurrencyCode>
<cbc:TaxCurrencyCode>SAR</cbc:TaxCurrencyCode>
<cac:AdditionalDocumentReference>
<cbc:ID>ICV</cbc:ID>
<cbc:UUID>10</cbc:UUID>
</cac:AdditionalDocumentReference>
<cac:AdditionalDocumentReference>
<cbc:ID>PIH</cbc:ID>
<cac:Attachment>
<cbc:EmbeddedDocumentBinaryObject mimeCode="text/plain">NWZlY2ViNjZmZmM4NmYzOGQ5NTI3ODZjNmQ2OTZjNzljMmRiYzIzOWRkNGU5MWI0NjcyOWQ3M2EyN2ZiNTdlOQ==</cbc:EmbeddedDocumentBinaryObject>
</cac:Attachment>
</cac:AdditionalDocumentReference>
<cac:AccountingSupplierParty>
<cac:Party>
<cac:PartyIdentification>
<cbc:ID schemeID="CRN">1010010000</cbc:ID>
</cac:PartyIdentification>
<cac:PostalAddress>
<cbc:StreetName>الامير سلطان | Prince Sultan</cbc:StreetName>
<cbc:BuildingNumber>2322</cbc:BuildingNumber>
<cbc:CitySubdivisionName>المربع | Al-Murabba</cbc:CitySubdivisionName>
<cbc:CityName>الرياض | Riyadh</cbc:CityName>
<cbc:PostalZone>23333</cbc:PostalZone>
<cac:Country>
<cbc:IdentificationCode>SA</cbc:IdentificationCode>
</cac:Country>
</cac:PostalAddress>
<cac:PartyTaxScheme>
<cbc:CompanyID>399999999900003</cbc:CompanyID>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:PartyTaxScheme>
<cac:PartyLegalEntity>
<cbc:RegistrationName>شركة توريد التكنولوجيا بأقصى سرعة المحدودة | Maximum Speed Tech Supply LTD</cbc:RegistrationName>
</cac:PartyLegalEntity>
</cac:Party>
</cac:AccountingSupplierParty>
<cac:AccountingCustomerParty>
<cac:Party>
<cac:PostalAddress>
<cbc:StreetName>صلاح الدين | Salah Al-Din</cbc:StreetName>
<cbc:BuildingNumber>1111</cbc:BuildingNumber>
<cbc:CitySubdivisionName>المروج | Al-Murooj</cbc:CitySubdivisionName>
<cbc:CityName>الرياض | Riyadh</cbc:CityName>
<cbc:PostalZone>12222</cbc:PostalZone>
<cac:Country>
<cbc:IdentificationCode>SA</cbc:IdentificationCode>
</cac:Country>
</cac:PostalAddress>
<cac:PartyTaxScheme>
<cbc:CompanyID>399999999800003</cbc:CompanyID>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:PartyTaxScheme>
<cac:PartyLegalEntity>
<cbc:RegistrationName>شركة نماذج فاتورة المحدودة | Fatoora Samples LTD</cbc:RegistrationName>
</cac:PartyLegalEntity>
</cac:Party>
</cac:AccountingCustomerParty>
<cac:Delivery>
<cbc:ActualDeliveryDate>2022-08-17</cbc:ActualDeliveryDate>
</cac:Delivery>
<cac:PaymentMeans>
<cbc:PaymentMeansCode>10</cbc:PaymentMeansCode>
</cac:PaymentMeans>
<cac:AllowanceCharge>
<cbc:ChargeIndicator>false</cbc:ChargeIndicator>
<cbc:AllowanceChargeReasonCode>95</cbc:AllowanceChargeReasonCode>
<cbc:AllowanceChargeReason>discount</cbc:AllowanceChargeReason>
<cbc:Amount currencyID="SAR">100</cbc:Amount>
<cac:TaxCategory>
<cbc:ID>S</cbc:ID>
<cbc:Percent>15</cbc:Percent>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:TaxCategory>
</cac:AllowanceCharge>
<cac:TaxTotal>
<cbc:TaxAmount currencyID="SAR">44020.84</cbc:TaxAmount>
</cac:TaxTotal>
<cac:TaxTotal>
<cbc:TaxAmount currencyID="SAR">44020.84</cbc:TaxAmount>
<cac:TaxSubtotal>
<cbc:TaxableAmount currencyID="SAR">293472.29</cbc:TaxableAmount>
<cbc:TaxAmount currencyID="SAR">44020.84</cbc:TaxAmount>
<cac:TaxCategory>
<cbc:ID>S</cbc:ID>
<cbc:Percent>15.00</cbc:Percent>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:TaxCategory>
</cac:TaxSubtotal>
<cac:TaxSubtotal>
<cbc:TaxableAmount currencyID="SAR">97857.43</cbc:TaxableAmount>
<cbc:TaxAmount currencyID="SAR">0.00</cbc:TaxAmount>
<cac:TaxCategory>
<cbc:ID>E</cbc:ID>
<cbc:Percent>0</cbc:Percent>
<cbc:TaxExemptionReasonCode>VATEX-SA-29-7</cbc:TaxExemptionReasonCode>
<cbc:TaxExemptionReason>Life insurance</cbc:TaxExemptionReason>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:TaxCategory>
</cac:TaxSubtotal>
</cac:TaxTotal>
<cac:LegalMonetaryTotal>
<cbc:LineExtensionAmount currencyID="SAR">391429.72</cbc:LineExtensionAmount>
<cbc:TaxExclusiveAmount currencyID="SAR">391329.72</cbc:TaxExclusiveAmount>
<cbc:TaxInclusiveAmount currencyID="SAR">435350.56</cbc:TaxInclusiveAmount>
<cbc:AllowanceTotalAmount currencyID="SAR">100</cbc:AllowanceTotalAmount>
<cbc:PrepaidAmount currencyID="SAR">0</cbc:PrepaidAmount>
<cbc:PayableAmount currencyID="SAR">435350.56</cbc:PayableAmount>
</cac:LegalMonetaryTotal>
<cac:InvoiceLine>
<cbc:ID>1251</cbc:ID>
<cbc:InvoicedQuantity unitCode="PCE">3.00</cbc:InvoicedQuantity>
<cbc:LineExtensionAmount currencyID="SAR">293572.29</cbc:LineExtensionAmount>
<cac:TaxTotal>
<cbc:TaxAmount currencyID="SAR">44035.84</cbc:TaxAmount>
<cbc:RoundingAmount currencyID="SAR">337608.13</cbc:RoundingAmount>
</cac:TaxTotal>
<cac:Item>
<cbc:Name>Multi-Disciplinary Services</cbc:Name>
<cac:ClassifiedTaxCategory>
<cbc:ID>S</cbc:ID>
<cbc:Percent>15.00</cbc:Percent>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:ClassifiedTaxCategory>
</cac:Item>
<cac:Price>
<cbc:PriceAmount currencyID="SAR">97857.43</cbc:PriceAmount>
</cac:Price>
</cac:InvoiceLine>
<cac:InvoiceLine>
<cbc:ID>1174</cbc:ID>
<cbc:InvoicedQuantity unitCode="PCE">1.00</cbc:InvoicedQuantity>
<cbc:LineExtensionAmount currencyID="SAR">97857.43</cbc:LineExtensionAmount>
<cac:TaxTotal>
<cbc:TaxAmount currencyID="SAR">0.00</cbc:TaxAmount>
<cbc:RoundingAmount currencyID="SAR">97857.43</cbc:RoundingAmount>
</cac:TaxTotal>
<cac:Item>
<cbc:Name>Design Consultancy Services</cbc:Name>
<cac:ClassifiedTaxCategory>
<cbc:ID>E</cbc:ID>
<cbc:Percent>0</cbc:Percent>
<cac:TaxScheme>
<cbc:ID>VAT</cbc:ID>
</cac:TaxScheme>
</cac:ClassifiedTaxCategory>
</cac:Item>
<cac:Price>
<cbc:PriceAmount currencyID="SAR">97857.43</cbc:PriceAmount>
</cac:Price>
</cac:InvoiceLine>
</Invoice>
Validation Result
Hope this help.

