We have migrated to R12.2.6 from 11i. We need to chanege previosly cretaed invoices to add tax calculation.
I open an old invoice and add Tax classification code at the invoice line. Click Tax Details and the form Detail Tax is empty and Tax is not calculated.
When I add Tax classification code at any new invoice, the form is filled and I can calculate tax.
What should we do with migrated invoces so we can able to change them and add tax classification code to calculate tax?