Next 90 Days Due Dates Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec All 25 Dec 25 Deposit of GST under QRMP scheme for November . 28 Dec 25 Return for November by persons with Unique Identification Number (UIN) like embassies etc to get refund under GST for goods and services purchased by them. 31 Dec 25 Annual Return by OPCs and Small Companies. 31 Dec 25 Annual Return by companies other than OPCs and small companies. 31 Dec 25 Filing of Cost Audit Report for 2024-25 by Company to whom cost audit is applicable. (within 30 days of submission by Cost Auditor report) 31 Dec 25 Filing of financial statements by Cos (Other than OPCs) for FY 2024-25 with the ROC. (30 days from AGM.)