If you’ve accidentally rejected a purchase invoice, you can return it to the list of open invoices with the following steps:
Navigate to Purchases.
Select Purchase Invoices.
Click on All Purchase Invoices.
Find the invoice you want to restore and click on its row.
Press the Edit (pencil) icon.
Click Save, approve, and move to next.
✅ The invoice is now returned to the Open Invoices list and is ready for processing.