Tax Calculation is Wrong for Imported AP Invoices

Hi Team,

We are currently implementing a solution where AP Invoices are imported into Oracle EBS without any tax lines or tax information. After import, the user is expected to manually enter the Tax Classification Code at Invoice Line Level (if not available in the Supplier Master) and then click on Calculate Tax.

However, in this case, while the Tax Rate displays as 21%, the actual Tax Amount shows as 0.

On the other hand, for the same Supplier/Site combination, when the invoice is created manually in Oracle EBS with the Tax Classification Code, the Calculate Tax function works as expected — showing the Tax Rate as 21% and calculating the Tax Amount correctly as 21% of the invoice line value.