i added by mistake the invoice amount as paid , i want to revert the action

Hello there, Ali. You can reverse this action by deleting the payment you accidentally made. Simply go to the Sales Transactions page to find the payment. From there, click the dropdown menu and select Delete.  

After that, you’ll notice that the original invoice automatically becomes open or unpaid again.

By the way, if you have already created a bank deposit for this payment, you’ll need to delete the deposit first.

Let us know if you have additional concerns. We're here to help.