You can unallocate a supplier payment from a purchase invoice in two ways:

• Directly from the purchase invoice
• From the supplier payment

Once you unallocate your transactions, the purchase invoice becomes outstanding and your supplier payment shows as a payment on account.

1. Go to Purchases and then Purchase Invoices.
2. Search for the relevant invoice and open it.
3. Select the '1 payment link'.
   
   ▼ Where is the payment link?

   

4. In the Amount column, select the supplier payment value.
5. Deselect the checkbox with the invoice selected.
   
   ▼ Where is the invoice selected?

   

6. Select Save.

The payment no longer links to the purchase invoice, so you can edit or reverse the invoice. Sage Accounting saves the payment on the supplier's account.