If you enter an invoice incorrectly, we recommend that you reverse it, or, if need be, that you make a manual posting to the vendor. It is necessary to safeguard clearing not only of the vendor items but also of the tax account items (tax account items are not cleared automatically even if you reverse an invoice).

If you have already paid the invoice and transferred the tax, you must make a manual posting for the reversal and target tax codes (unless the tax credit memo was required).