When the turnover crosses the threshold limit of Rs. 20 lacs (Rs. 10 lacs for specific cases of North-east states) and services covered under Online Information and Database Access and Retrieval services (‘OIDAR’) then the freelancer is liable to be registered.
GST tax rates are 0%, 5%, 12%, 18% and 28%. If there’s no specified GST rate for your service, you’re liable for 18% GST.