16 February 2018
X Company forgot some sales of Rs 100000 /- Taxable value @18%. in Sept 2017 In GSTR -3B and also forgot to file in the GSTR-1 in Quarterly Return ie in Sept 2017 the same invoices.
Company also filed GSTR-1 for Q3 ie Dec 2017 ended without considering the above invoice. My question is what is the interest amount ? for SGST and CGST? and how to rectify that mistake now.