GST Registration in India Under the new tax regime of Goods and Services Tax, all persons involved in the supply of goods or services are required to obtain registration of GST. Those who are not registered under GST shall not be allowed to collect GST from customers or claim input tax credit (ITC) on inward supply. GST Council has prescribed 20 Lakhs of turnover to be the threshold limit for registration under GST. However, for northeastern states, it is 10 Lakhs. The registration must be applied within 30 days of reaching the threshold limit. For GST, the term Aggregate Turnover means all supplies made by the taxable person whether on his own or behalf of a principal. However, in case of registered job worker, the turnover of supplies under job work won't be included in his turnover. Registration is though online but is very tricky and should be done by professionals only.