If you don’t know how to apply for GST, you can do so online or by visiting a GST Seva Kendra.
The online procedure for GST registration is the one that most individuals go for. You have to do so by visiting the official portal of GST.

The online registration process is split into two parts. Part A involves filling the GST REG-01. Click "Services", then "Registration", and finally "New Registration". Provide the necessary information like your PAN, entity name, phone number, email address, etc.
An OTP will be sent to your mobile number and email after you proceed. Enter the OTP and proceed. You will receive a Temporary Reference Number (TRN).
Visit this same page again and select the Temporary Reference Number (TRN). Enter the OTP sent to your mobile.
Next, you will be able to view your application. Click on the edit icon to start Part B of your registration process.
In the first step, you have to provide your business details. Upload all your business documents. Next, you have to provide information about your promoters/partners. Then you have to provide your authorised signatory. Next, you have to add details of an authorised representative who will file your returns.
You have to add the principal place of business and additional places of business. Next, you have to add the goods and services relative to the enterprise, bank account information, and state-specific information.
Lastly, you have to verify all the information you have provided. After successful completion, you will receive your certificate of registration with the GSTIN.