In 2017 October GSTR 3B Claimed as CGST ₹ 895670/-&SGST ₹ 89567/-.But Actual Claim is ₹ 89567/-each in CGST and SGST Respectively.How can rectify the error in GSTR9.
You have to reverse the extra ITC in GSTR-9 and have to pay tax by using form GST DRC-03 You had the opportunity to rectify it through 3B, but the last date for that was 23.04.2019 (i.e. The last date for filing of 3B for Mar, 2019)