Following are the consequence for non-compliance with the conditions specified for composition scheme:
1. shall be liable to pay additional taxes at the rates applicable to regular taxable person;
2. shall be liable to penalty; and
3. the amount of tax and penalty shall be recovered in terms of Section 73 or 74of the CGST Act, 2017.
(ICAI FAQ PUBLICATION 06-09-2017 COMPOSITION LEVY: FAQ NO.61)