“Invoice No. is already used” message

Every document number must be unique. If you type a number that exists, saving stops with a message like: Invoice No. “INV-0007” is already used. Use INV-0008, or leave the field blank and it will be filled in for you.

Fix it

• Use the suggested number shown in the message, or
• Clear the number box and save — the next free number is filled in for you.

“…already used by a document in the Trash”

A deleted document still holds its number while it is in the Trash. Restore it if it was deleted by mistake, or use a different number. Edit, cancel or delete an invoice