Yes, the basic exemption limit of $ 15,385 ($ 7693 in the case of special category States) is applicable to the tiny and micro segment even in mining. However, a person engaged in making taxable supply and having aggregate annual turnover (more than $ 15,385in any State other than the special category States) would be liable to obtain registration under GST. The return has to be filed on monthly basis by regular taxable persons and on quarterly basis by the taxable persons registered under the composition scheme.