Regarding E invoice amendment

As per GST regulations, you can amend an e-invoice on the GST portal within a certain timeframe. Currently, you can modify or delete an e-invoice within 24 hours of generation.

However, if you want to amend the date of the e-invoice, you'll need to follow these steps:

1. Cancel the original e-invoice (within 24 hours) and generate a new one with the correct date.

2. If the 24-hour window has passed, you can file an amendment return in GSTR-1 (outward supplies) for the relevant tax period.

 To amend the date in GSTR-1: - Log in to the GST portal and go to the "Services" tab. -

Select "Returns Dashboard" and choose the relevant financial year and tax period. -

 Click on "Amendment of Return" and select the original return period. -

Make the necessary changes, including the correct date. - 

File the amended return (GSTR-1) and pay any additional tax liability. 

Keep in mind that you may need to provide reasons for the amendment and ensure that the changes are made within the allowed timeframe.