Understanding the Tax File Revisions Program
Use the Tax File Revisions program to review, add, delete, and modify records in the F0018 table. For example, if you did not set the appropriate processing option in the version of the General Ledger Post Report program (R09801) to update the F0018 table, you might need to enter the tax information manually using the Tax File Revisions program. Similarly, you might want to delete a transaction from the table.
The system does not allow revisions to documents that begin with the letter P or R (which are normally used for voucher and invoice transactions). Because you cannot revise invoice or voucher records in the F0018 table, you must either:
Make revisions using the standard entry program, and then post those changes to update the F0018 table.
Add a new transaction to the F0018 table to adjust the tax amount appropriately.
If you revise the taxable or nontaxable amounts of a journal entry and you clear the Tax field, the system recalculates the tax amount.