SII XML Creator generates incorrect InversionSujetoPasivo node for Customs – Complementary Settlement (LC) invoices

[BeaLavin81]

Why do you need this change?

We have identified an issue in the standard SII XML generation logic within codeunit 10750 “SII XML Creator”.
The system incorrectly generates the XML node:
for purchase invoices classified as: Customs – Complementary Settlement (LC)
These documents are posted using Reverse Charge VAT. However, according to the validation behavior received from AEAT, the presence of the InversionSujetoPasivo node causes the SII submission to be rejected.
Current standard logic identified in codeunit 10750:

local procedure UseReverseChargeNotIntracommunity(
    VATCalcType: Enum "Tax Calculation Type";
    VendNo: Code[20];
    PostingDate: Date;
    InvoiceType: Text): Boolean
var
    VATEntry: Record "VAT Entry";
    SIIInitialDocUpload: Codeunit "SII Initial Doc. Upload";
begin
    exit(
      (VATCalcType = VATEntry."VAT Calculation Type"::"Reverse Charge VAT") and
      (not SIIManagement.VendorIsIntraCommunity(VendNo)) and
      (InvoiceType <> GetF5InvoiceType()) and
      (not SIIInitialDocUpload.DateWithinInitialUploadPeriod(PostingDate)));
end;

The exception currently implemented only excludes invoice type F5:
local procedure GetF5InvoiceType(): Text[2]
begin
    exit('F5');
end;

Because of this implementation, LC invoice types are also considered valid for InversionSujetoPasivo generation.

Steps to reproduce

1. Create a purchase invoice
2. Use invoice type “Customs – Complementary Settlement (LC)”
3. Configure VAT as Reverse Charge VAT
4. Post the invoice
5. Generate SII XML
6. Verify that is generated
7. Submit XML to AEAT
8. AEAT rejects the submission

Expected result
should not be generated for LC invoice types.

Actual result
is generated and the SII submission is rejected by AEAT.

Technical object involved
Codeunit 10750 – “SII XML Creator”
Procedure: UseReverseChargeNotIntracommunity

Describe the request

Expected behavior:
For invoice type: Customs – Complementary Settlement (LC) Business Central should NOT generate even when Reverse Charge VAT is used.

Current behavior:
XML includes InversionSujetoPasivo --> AEAT rejects the SII submission
The issue appears to originate from missing LC handling in the Reverse Charge exclusion logic implemented in codeunit 10750 – SII XML Creator.

[JesperSchulz]

Nice catch! Let's get the issue to a team who will fix and backport it, as this repo only is for extensibility related issues in the upcoming release. We suggest that you open a support case or file a bug in Collaborate, to ensure that all Business Central users benefit from your catch as soon as possible.

To open a support case, you can:

• Open a support request to CSS through the PartnerSource portal
• Contact your Service Account Manager (SAM) in your local subsidiary to understand what is included in your contract as of support incident and PAH (Partner Advisory Hours). Your SAM might also direct you "step by step" how to open a support request or how to get credentials, if this is the first time for you or your company

If you file the bug in Collaborate, remember to include steps to reproduce the issue, and the Business Central build number and country version you're using. Here's a link to Collaborate: https://developer.microsoft.com/en-us/dashboard/collaborate/engagements/1173/feedback/wits/Bugs/create.

Thanks for reporting the issue.

[BeaLavin81]

Thanks!