Non-Taxable Amount Posting in xml file

Request you to please help me to Pass Non-Taxable Amount in xml file in such a value to display total amount in QR Code as well.
kindly help in which xml tag i can pass non-taxable amount
My breakup is as follows:

Taxable Amount : 5
Tax Amount : 0.75
Non-Taxable Amount : 500
Total Invoice Amount : 505.75

cac:TaxTotal
<cbc:TaxAmount currencyID=“SAR”>0.75</cbc:TaxAmount>
</cac:TaxTotal>

cac:TaxTotal
<cbc:TaxAmount currencyID=“SAR”>0.75</cbc:TaxAmount>
cac:TaxSubtotal
<cbc:TaxableAmount currencyID=“SAR”>5</cbc:TaxableAmount>
<cbc:TaxAmount currencyID=“SAR”>0.75</cbc:TaxAmount>
cac:TaxCategory
<cbc:ID schemeID=“UN/ECE 5305” schemeAgencyID=“6”>S</cbc:ID>
cbc:Percent15.00</cbc:Percent>
cac:TaxScheme
<cbc:ID schemeID=“UN/ECE 5153” schemeAgencyID=“6”>VAT</cbc:ID>
</cac:TaxScheme>
</cac:TaxCategory>
</cac:TaxSubtotal>
</cac:TaxTotal>

cac:LegalMonetaryTotal
<cbc:LineExtensionAmount currencyID=“SAR”>5</cbc:LineExtensionAmount>
<cbc:TaxExclusiveAmount currencyID=“SAR”>5</cbc:TaxExclusiveAmount>
<cbc:TaxInclusiveAmount currencyID=“SAR”>5.75</cbc:TaxInclusiveAmount>
<cbc:AllowanceTotalAmount currencyID=“SAR”>0.00</cbc:AllowanceTotalAmount>
<cbc:PrepaidAmount currencyID=“SAR”>0.00</cbc:PrepaidAmount>
<cbc:PayableAmount currencyID=“SAR”>PayableAmount</cbc:PayableAmount>
</cac:LegalMonetaryTotal>

cac:InvoiceLine
cbc:ID1</cbc:ID>
<cbc:InvoicedQuantity unitCode=“PCE”>1</cbc:InvoicedQuantity>
<cbc:LineExtensionAmount currencyID=“SAR”>5</cbc:LineExtensionAmount>
cac:TaxTotal
<cbc:TaxAmount currencyID=“SAR”>0.75</cbc:TaxAmount>
<cbc:RoundingAmount currencyID=“SAR”>RoundingAmount</cbc:RoundingAmount>
</cac:TaxTotal>
cac:Item
cbc:NameTicket</cbc:Name>
cac:ClassifiedTaxCategory
cbc:IDS</cbc:ID>
cbc:Percent15.00</cbc:Percent>
cac:TaxScheme
cbc:IDVAT</cbc:ID>
</cac:TaxScheme>
</cac:ClassifiedTaxCategory>
</cac:Item>

cac:Price
<cbc:PriceAmount currencyID=“SAR”>5</cbc:PriceAmount>
cac:AllowanceCharge
cbc:ChargeIndicatortrue</cbc:ChargeIndicator>
cbc:AllowanceChargeReasondiscount</cbc:AllowanceChargeReason>
<cbc:Amount currencyID=“SAR”>0.00</cbc:Amount>
</cac:AllowanceCharge>
</cac:Price>
</cac:InvoiceLine>