Code tax line from an AGIS invoice, it shows the AR tax code instead AP tax code

Hello.

We migrated from 12.0.4 to 12.1.3, in AGIS we have the following problem: When we run the interface to create an invoice in AP, in the tax line it shows the code of VAT tax from Receivables and the account field shows the account combination from AR, the line tax in Payables should shows the VAT Tax Code for Payables and its own account combination. Do you know if there's any setup that I have missed??

Thanks for your suggestions.