The system-calculated GST value for pending vendor invoice line(s) cannot be adjusted according to the vendor invoice. While we can update the overall GST at the header level of the pending vendor invoice, we are unable to make adjustments at the individual line level, causing discrepancies between the GST amounts on product receipts and vendor invoices.

Microsoft has already implemented a similar feature in Accounts Receivable (AR), which allows for GST overrides at the sales order line. This is managed through the "Enable tax adjustment in detailed mode" option found under AR parameters. Unfortunately, this functionality is not currently available for Accounts Payable (AP) pending vendor invoice lines, which hinders our ability to align the GST of specific lines with the vendor invoice.

The Microsoft engineering team should consider extending the feature that allows GST override at the invoice line level to pending vendor invoices, similar to sales order lines.