Regarding GST registration

If you forgot your username, you can generate username with following steps:
First go to GST portal by accessing GST.GOV.IN.
Once you are there click on Existing User Login.
After clicking you will see the login form.
Click on forgot username.
A new form will open.
Provide the provisional ID provided by VAT website, initially when you logged into your vat account.
Provide the provisional Id. You will receive an OTP on your mobile and email.
Fill your details and click on Generate OTP.
You will receive OTP.
Fill the OTP in form and click on submit.
A new form will open.
Provide new username.
This will be your new username and you can login to your GST portal with new username generated.