ERROR: 'You can't edit this transaction as it has an associated payment or refund.'

You see this error when you saved the receipt to the customer's account first, then allocated it to an invoice later.

To edit the receipt:

1. Break the customer allocation.
2. Edit the customer receipt.

ERROR: 'Included on VAT Return.'

You see this error when you use the Cash Accounting VAT scheme, because customer receipts appear on the VAT Return.

If the receipt is on a draft VAT Return:

1. Delete the VAT Return.
2. Edit the customer receipt.

If the receipt is on a submitted VAT Return:

Reverse the receipt , then re-enter it. You can only reverse a receipt that doesn't pay an invoice, so you may first need to unallocate the receipt from the invoice.