Hi there, @dnyaneshwar.
Thank you for posting here in the Community. I can assist you with your GSTR-1 concern in QuickBooks Online.
If you're trying to file your GSTR1 within QuickBooks, you can perform the process within the Reports section. You can use the GSTR-1 : Summary of outward supplies Report to submit the information.
For the detailed instructions, I recommend you visit this link: GSTR-1 Filing. However, if you want to export the data for GSTR1, please follow these steps:
For additional reference, you can use the following articles to learn more about how to handle GSTR1 in QuickBooks:
Please let me know if you need anything else. The Community and I will be here to help you.