Editing a paid invoice
From the Invoice, open the payment
Click on the X at the end of the invoice line
Bp Allied will ask to confirm the removal

Click Ok to confirm the removal
Go back to the Invoice by clicking on the item in the Invoice/Payment Transaction List

In the Invoice screen
Click on Change Status
Select Draft
Click OK
Edit the invoice as required.
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If you are unable to edit the item price you will need to change the setting in System > Options > Invoice > Allow Invoice Item Price Editing.
Click Save
Go back to the Payment by clicking on the item in the Invoice/Payment Transaction List
In the Payment screen
Click Add Invoice to select the invoice from the list
Click OK
Click Save
The payment (or payments, as appropriate) should now be seen attached to the invoice from within the invoice screen.
