step1:To open GST online website click here. Click on login from the top of menu bar.
If you are Existed user enter user name, password and captcha code. If you are new user click on ‘click here’ as shown in below image.
You will get a form, enter Provisional ID / GSTIN / UIN , Password and Captcha.
step3:Click on login button.
This GSTN portal will be taken You to the dashboard on successful login where you can see a summary of the GST Credits that you have, GST Payable (if any), Notices, etc.