How to unallocate receipts or payments from an invoice

Go to Banking.
Select the relevant bank account used for the receipt or payment.
Open the Activity tab and click the receipt or payment to change its allocation.
In the Customer Receipt or Vendor Payment window, clear the checkbox for the related invoice or credit note.

NOTE:

If the receipt or payment covers multiple items, unallocating one leaves the others unchanged. From Display, choose All, then select the correct invoice or receipt to reallocate the unallocated amount.
Click Save to update the transaction.
Click Yes to store the unallocated amount as a payment on account.

Unallocating one item in a multi-invoice payment doesn’t affect the remaining allocations. You can reallocate the freed amount to another document.

To unallocate an invoice and credit note, see How to unallocate an invoice and credit note.