1. Go to the Login page of GST Portal

  2. Click on Forgot Password

  3. Enter the username and captcha code. Click on Generate OTP

  4. Enter OTP sent on registered email or mobile. Click on Continue

  5. Enter the new password and reconfirm the password

  6. Click on Submit

  7. Use the new credentials to login to the GST Portal.

Read step-wise process - GST Portal Login : Forgot Password