Sdk versions 3.2.6 and 3.3.3

[Ather]

@Mudassir

try this code,
xmlDoc.PreserveWhitespace = true;

            XmlDocument xmlDoc = new XmlDocument();
            var s =new Zatca.EInvoice.SDK.EInvoiceSigner();
            string cert = File.ReadAllText(Global.eInvoiceData_Path + @"\ZatcaConfigFiles\Certificate.crt");
            string privateKey = File.ReadAllText(Global.eInvoiceData_Path + @"\ZatcaConfigFiles\pkey.pem");
            string PIH = File.ReadAllText(Global.eInvoiceData_Path + @"\ZatcaConfigFiles\pih.txt");
          xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load(@"D:\yourxml.xml");
            var ss =s.SignDocument(xmlDoc, cert , privateKey);               
            var v = new Zatca.EInvoice.SDK.EInvoiceValidator();
            var results =  v.ValidateEInvoice(ss.SignedEInvoice, cert, PIH);

check the XML,
I just Sign and Validate it its working.

<?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"><ext:UBLExtensions>
    <ext:UBLExtension>
        <ext:ExtensionURI>urn:oasis:names:specification:ubl:dsig:enveloped:xades</ext:ExtensionURI>
        <ext:ExtensionContent>
            <sig:UBLDocumentSignatures xmlns:sig="urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2" xmlns:sac="urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2" xmlns:sbc="urn:oasis:names:specification:ubl:schema:xsd:SignatureBasicComponents-2">
                <sac:SignatureInformation>
                    <cbc:ID>urn:oasis:names:specification:ubl:signature:1</cbc:ID>
                    <sbc:ReferencedSignatureID>urn:oasis:names:specification:ubl:signature:Invoice</sbc:ReferencedSignatureID>
                    <ds:Signature Id="signature" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
                        <ds:SignedInfo>
                            <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2006/12/xml-c14n11" />
                            <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256" />
                            <ds:Reference Id="invoiceSignedData" URI="">
                                <ds:Transforms>
                                    <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
                                        <ds:XPath>not(//ancestor-or-self::ext:UBLExtensions)</ds:XPath>
                                    </ds:Transform>
                                    <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
                                        <ds:XPath>not(//ancestor-or-self::cac:Signature)</ds:XPath>
                                    </ds:Transform>
                                    <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
                                        <ds:XPath>not(//ancestor-or-self::cac:AdditionalDocumentReference[cbc:ID='QR'])</ds:XPath>
                                    </ds:Transform>
                                    <ds:Transform Algorithm="http://www.w3.org/2006/12/xml-c14n11" />
                                </ds:Transforms>
                                <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
                                <ds:DigestValue>3RNj8syuVLnytuBGrgqlP1QVn2PTkhZen7eopFI/JOE=</ds:DigestValue>
                            </ds:Reference>
                            <ds:Reference Type="http://www.w3.org/2000/09/xmldsig#SignatureProperties" URI="#xadesSignedProperties">
                                <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
                                <ds:DigestValue>YmZjNmE4NDc1MDRjYTE4ZTQ2ZDNhZDVjZDI2ODYwMDQwNjFkNmI4YzdiNmEzYTI3ZTI5NDVmZTljNWM5ZTNhMA==</ds:DigestValue>
                            </ds:Reference>
                        </ds:SignedInfo>
                        <ds:SignatureValue>MEQCICtDUjzt65nhf35/qRYXu3uYDC5HeLUAaB8SowAmIOFFAiA4lsh+YugMr2NAmPwNtW8wQqFl/GJYOKVuY8vv/l7kfg==</ds:SignatureValue>
                        <ds:KeyInfo>
                            <ds:X509Data>
                                <ds:X509Certificate>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</ds:X509Certificate>
                            </ds:X509Data>
                        </ds:KeyInfo>
                        <ds:Object>
                            <xades:QualifyingProperties Target="signature" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
                                <xades:SignedProperties Id="xadesSignedProperties">
                                    <xades:SignedSignatureProperties>
                                        <xades:SigningTime>2024-10-16T14:28:17</xades:SigningTime>
                                        <xades:SigningCertificate>
                                            <xades:Cert>
                                                <xades:CertDigest>
                                                    <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
                                                    <ds:DigestValue>NjA5ZjMwNjlkZTBiZjIyMDcwZTM4NGZkMzc0N2M4NGM2YTQ5OTc0OWI1MmE2Yjg2ZTJmOTc2YjU2YTE5NmFlNw==</ds:DigestValue>
                                                </xades:CertDigest>
                                                <xades:IssuerSerial>
                                                    <ds:X509IssuerName>CN=PEZEINVOICESCA3-CA, DC=extgazt, DC=gov, DC=local</ds:X509IssuerName>
                                                    <ds:X509SerialNumber>2720691019676834767321383131478249469464563542</ds:X509SerialNumber>
                                                </xades:IssuerSerial>
                                            </xades:Cert>
                                        </xades:SigningCertificate>
                                    </xades:SignedSignatureProperties>
                                </xades:SignedProperties>
                            </xades:QualifyingProperties>
                        </ds:Object>
                    </ds:Signature>
                </sac:SignatureInformation>
            </sig:UBLDocumentSignatures>
        </ext:ExtensionContent>
    </ext:UBLExtension>
</ext:UBLExtensions>
  
  <cbc:ProfileID>reporting:1.0</cbc:ProfileID>
  <cbc:ID>POS_Inv_15</cbc:ID>
  <cbc:UUID>26c6c536-d197-4fb3-bd12-20ccee9549e0</cbc:UUID>
  <cbc:IssueDate>2024-10-16</cbc:IssueDate>
  <cbc:IssueTime>03:32:00Z</cbc:IssueTime>
  <cbc:InvoiceTypeCode name="0200000">388</cbc:InvoiceTypeCode>
  <cbc:DocumentCurrencyCode>SAR</cbc:DocumentCurrencyCode>
  <cbc:TaxCurrencyCode>SAR</cbc:TaxCurrencyCode>
  <cac:AdditionalDocumentReference>
    <cbc:ID>ICV</cbc:ID>
    <cbc:UUID>15</cbc:UUID>
  </cac:AdditionalDocumentReference>
  <cac:AdditionalDocumentReference>
    <cbc:ID>PIH</cbc:ID>
    <cac:Attachment>
      <cbc:EmbeddedDocumentBinaryObject mimeCode="text/plain">ffLmjOiIemMUseTozxoA1XkyO600KPEXKD06M3YG5NI=</cbc:EmbeddedDocumentBinaryObject>
    </cac:Attachment>
  </cac:AdditionalDocumentReference>
  <cac:AdditionalDocumentReference>
        <cbc:ID>QR</cbc:ID>
        <cac:Attachment>
            <cbc:EmbeddedDocumentBinaryObject mimeCode="text/plain">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</cbc:EmbeddedDocumentBinaryObject>
        </cac:Attachment>
</cac:AdditionalDocumentReference><cac:Signature>
      <cbc:ID>urn:oasis:names:specification:ubl:signature:Invoice</cbc:ID>
      <cbc:SignatureMethod>urn:oasis:names:specification:ubl:dsig:enveloped:xades</cbc:SignatureMethod>
</cac:Signature><cac:AccountingSupplierParty>
    <cac:Party>
      <cac:PartyIdentification>
        <cbc:ID schemeID="CRN">4030121675</cbc:ID>
      </cac:PartyIdentification>
      <cac:PostalAddress>
        <cbc:StreetName>العليا</cbc:StreetName>
        <cbc:BuildingNumber>6356</cbc:BuildingNumber>
        <cbc:PlotIdentification>3910</cbc:PlotIdentification>
        <cbc:CitySubdivisionName>العليا</cbc:CitySubdivisionName>
        <cbc:CityName>الرياض | Riyadh</cbc:CityName>
        <cbc:PostalZone>13321</cbc:PostalZone>
        <cac:Country>
          <cbc:IdentificationCode>SA</cbc:IdentificationCode>
        </cac:Country>
      </cac:PostalAddress>
      <cac:PartyTaxScheme>
        <cbc:CompanyID>300056769300003</cbc:CompanyID>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>
      <cac:PartyLegalEntity>
        <cbc:RegistrationName>OLAYA COMPANY</cbc:RegistrationName>
      </cac:PartyLegalEntity>
    </cac:Party>
  </cac:AccountingSupplierParty>
  <cac:AccountingCustomerParty>
    <cac:Party>
      <cac:PostalAddress>
        <cbc:StreetName>العليا</cbc:StreetName>
      </cac:PostalAddress>
      <cac:PartyTaxScheme>
        <cac:TaxScheme>
          <cbc:ID>VAT</cbc:ID>
        </cac:TaxScheme>
      </cac:PartyTaxScheme>
      <cac:PartyLegalEntity>
        <cbc:RegistrationName>Farhan Fasih</cbc:RegistrationName>
      </cac:PartyLegalEntity>
    </cac:Party>
  </cac:AccountingCustomerParty>
  <cac:TaxTotal>
    <cbc:TaxAmount currencyID="SAR">13.70</cbc:TaxAmount>
  </cac:TaxTotal>
  <cac:TaxTotal>
    <cbc:TaxAmount currencyID="SAR">13.70</cbc:TaxAmount>
    <cac:TaxSubtotal>
      <cbc:TaxableAmount currencyID="SAR">91.30</cbc:TaxableAmount>
      <cbc:TaxAmount currencyID="SAR">13.70</cbc:TaxAmount>
      <cac:TaxCategory>
        <cbc:ID schemeID="UN/ECE 5305" schemeAgencyID="6">S</cbc:ID>
        <cbc:Percent>15.00</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">91.30</cbc:LineExtensionAmount>
    <cbc:TaxExclusiveAmount currencyID="SAR">91.30</cbc:TaxExclusiveAmount>
    <cbc:TaxInclusiveAmount currencyID="SAR">105.00</cbc:TaxInclusiveAmount>
    <cbc:AllowanceTotalAmount currencyID="SAR">0.00</cbc:AllowanceTotalAmount>
    <cbc:PrepaidAmount currencyID="SAR">0.00</cbc:PrepaidAmount>
    <cbc:PayableAmount currencyID="SAR">105.00</cbc:PayableAmount>
  </cac:LegalMonetaryTotal>
  <cac:InvoiceLine>
    <cbc:ID>1</cbc:ID>
    <cbc:InvoicedQuantity unitCode="PCE">1</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="SAR">2.61</cbc:LineExtensionAmount>
    <cac:TaxTotal>
      <cbc:TaxAmount currencyID="SAR">0.39</cbc:TaxAmount>
      <cbc:RoundingAmount currencyID="SAR">3.00</cbc:RoundingAmount>
    </cac:TaxTotal>
    <cac:Item>
      <cbc:Name>Pepsi</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">2.61</cbc:PriceAmount>
      <cac:AllowanceCharge>
        <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
        <cbc:AllowanceChargeReason>discount</cbc:AllowanceChargeReason>
        <cbc:Amount currencyID="SAR">0</cbc:Amount>
      </cac:AllowanceCharge>
    </cac:Price>
  </cac:InvoiceLine>
  <cac:InvoiceLine>
    <cbc:ID>2</cbc:ID>
    <cbc:InvoicedQuantity unitCode="PCE">1</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="SAR">15.65</cbc:LineExtensionAmount>
    <cac:TaxTotal>
      <cbc:TaxAmount currencyID="SAR">2.35</cbc:TaxAmount>
      <cbc:RoundingAmount currencyID="SAR">18.00</cbc:RoundingAmount>
    </cac:TaxTotal>
    <cac:Item>
      <cbc:Name>Veg Biryani</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">15.65</cbc:PriceAmount>
      <cac:AllowanceCharge>
        <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
        <cbc:AllowanceChargeReason>discount</cbc:AllowanceChargeReason>
        <cbc:Amount currencyID="SAR">0</cbc:Amount>
      </cac:AllowanceCharge>
    </cac:Price>
  </cac:InvoiceLine>
  <cac:InvoiceLine>
    <cbc:ID>3</cbc:ID>
    <cbc:InvoicedQuantity unitCode="PCE">4</cbc:InvoicedQuantity>
    <cbc:LineExtensionAmount currencyID="SAR">73.04</cbc:LineExtensionAmount>
    <cac:TaxTotal>
      <cbc:TaxAmount currencyID="SAR">10.96</cbc:TaxAmount>
      <cbc:RoundingAmount currencyID="SAR">84.00</cbc:RoundingAmount>
    </cac:TaxTotal>
    <cac:Item>
      <cbc:Name>Supreme Veg Biryani Pack</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">18.26</cbc:PriceAmount>
      <cac:AllowanceCharge>
        <cbc:ChargeIndicator>true</cbc:ChargeIndicator>
        <cbc:AllowanceChargeReason>discount</cbc:AllowanceChargeReason>
        <cbc:Amount currencyID="SAR">0</cbc:Amount>
      </cac:AllowanceCharge>
    </cac:Price>
  </cac:InvoiceLine>
</Invoice>