Revising Unposted Manual Payments
You can change amounts on an unposted manual payment, but you cannot change the vouchers that are paid by it. For example, if you originally applied a payment to voucher 1001 PV, you cannot then change the voucher the payment was applied to so that it pays 1002 PV. You can, however, delete the payment and then apply the payment to a different voucher.
Important: If you change any information in the detail area other than the payment amount, you
are changing the voucher, not the payment. You run the risk of the payment not
posting. If you must change any information on a manual payment, you should delete
the payment and start over.