Avoid the requirement of seeking OTP multiple times from the registered user on the GST Portal. Use this premium feature, you would be able to get OTP Auto populated while filing your GST returns. To do this, follow the steps given below

Step 1: Set up the OTP Auto Forwarding Service

1. On your computer, open Gmail using the account you want to forward messages from. You can only forward messages for a single Gmail address, and not an email group or alias.
   

2. In the top right, click Settings .
   

3. Click Settings.
   

4. Click the Forwarding and POP/IMAP tab.
   

5. In the "Forwarding" section, click Add a forwarding address.
   

6. Enter otp@gstsoftware.com mail id ie the mail id you want to forward messages to.
   

7. Click Next >> Proceed >> OK.
   

8. Go back to the settings page for the Gmail account you want to forward messages from, and refresh your browser.
   

9. Click the Forwarding and POP/IMAP tab.
   

10. In the "Forwarding" section, select Forward a copy of incoming mail to.
    

11. Choose what you want to happen with the Gmail copy of your emails. We recommend keeping Gmail's copy in the Inbox.
    

12. At the bottom of the page, click Save Changes.
    

Step 2: Set up an Email Filter

1. Once verified, go back to Settings 
   

2. Click on the Forwarding and POP/IMAP tab.
   

3. Click on the link that says "Tip: You can also forward only some of your mail by creating a filter!" (see image above, below the add forwarding address button).
   

4. This will bring up a filter menu where you can create a filter to isolate the emails you need to forward. From email id: "donotreply@gst.gov.in" or Text "OTP" in Subject.
   

Step 3: Test and Use Email Filter

Configure your filter to match the emails you wish to auto-forward and click "create a filter with this search". 

Tip – Ensure to test your filter to make sure it’s capturing all/only the emails you want to forward.

Step 4: Select the Forwarding Address on which Filtered Mails are to be forwarded

Once you are happy with the filter check, click on the “Forward it to” checkbox and select the forwarding email address on which you want the emails to get forwarded.

Step 5: Click "Create Filter"

You should now have successfully set up your  Google Mail to forward emails from donotreply@gst.gov.in to otp@gstsoftware.com email account.