You can edit bills from the Bills page (Purchases menu > Bills).
If a bill has been paid in full, you'll first need to delete the payment before the bill can be edited.
You're not able to edit a bill that's in an unsupported layout. This includes Miscellaneous and Professional invoices created in AccountRight or in third-party add-ons, such as ReceiptBank. To make these editable, change their layout to a Service or Item layout in the software you used to create the bill.
To edit a bill
From the Purchases menu, choose Bills.
In the bills list, find the bill you want to edit. See Viewing bills if you need help.
Click the Bill number of the bill you want to edit. The Bill page appears, showing the bill details.
Make your changes.
When you're done, click Save.
Need to change a supplier's details?
See Adding, editing and deleting customers and suppliers. After updating a supplier's details, to see the changes reflected on an existing bill (such as a change of address), open the bill and click Save. The updated address will now show.