How can I unfile the GSTR-1 return that has been marked as filed accidently?

To unfile your returns in Zoho Books:

1. Click GST Filing in the left sidebar.
2. Select the transactions below the GSTR-1 section and navigate to the File your Return tab.
3. Click Mark as Unfiled in the top right corner.

5. Click Yes, Mark as Unfiled and confirm the action.

Once you’ve marked the return as unfiled, you will be able to update the transactions related to GSTR 1 and push them to the GST portal.