20 Oct 25 Monthly Return by persons outside India providing online information and data base access or retrieval services, for September.

20 Oct 25 To add/amend particulars (other than GSTIN) in GSTR-1 of Sep. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B.

20 Oct 25 Summary Return cum Payment of Tax for September by Monthly filers. (other than QRMP).

22 Oct 25 Add/amend particulars (other than GSTIN) in GSTR-1 of Sep quarter by Quarterly filers in Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, the Union territories of Daman and Diu and Dadra an

22 Oct 25 Summary Return of Jul-Sep quarter by Quarterly filers in Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, the Union territories of Daman and Diu and Dadra and Nagar Haveli, Puducherry, Anda

24 Oct 25 Add/amend particulars (other than GSTIN) in GSTR-1 of Sep quarter by Quarterly filers in Himachal Pradesh, Punjab, Uttarakhand, Haryana, Rajasthan, Uttar Pradesh, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, Wes

24 Oct 25 Summary Return of Jul-Sep quarter by Quarterly filers in Himachal Pradesh, Punjab, Uttarakhand, Haryana, Rajasthan, Uttar Pradesh, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, West Bengal, Jharkhand or Odisha, t

25 Oct 25 Half yearly Details of goods/capital goods sent to & from job worker for Apr-Sep for turnover above 5 cr.

26 Oct 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)

28 Oct 25 Return for September by persons with Unique Identification Number (UIN) like embassies etc to get refund under GST for goods and services purchased by them.

29 Oct 25 Filing of financial statements by Cos (Other than OPCs) for FY 2024-25 with the ROC. (30 days from AGM.)

29 Oct 25 Report on Annual General Meeting by Listed company when AGM held on 30 Sep. (within 30 days from completion of AGM).

29 Oct 25 Statement of Accounts and Solvency for 2024-25 to be filed by every LLP.

30 Oct 25 Half-yearly return by Nidhi Companies for April to September.

30 Oct 25 Issue of TCS certificate by All Collectors for September quarter.

30 Oct 25 Deposit of TDS u/s 194-IA on payment made for purchase of property in September.

30 Oct 25 Deposit of TDS u/s 194-IB @ 5% on total payment of Rent more than 50,000 pm by individual or HUF (not liable to tax audit) during FY 24-25, where lease has terminated in Sep. (Else TDS is to be deposited on annual basis by 30 April of next year.)

30 Oct 25 Deposit of TDS on certain payments made by individual/HUF u/s 194M for September.

30 Oct 25 Deposit of TDS on Virtual Digital Assets u/s 194S for September.

31 Oct 25 Specified Companies(receiving supplies from Micro & Small Enterprises whose outstanding dues exceed 45 days) to file details of all outstanding dues to Micro or Small enterprises suppliers for Apr to Sep. Details of even those MSME vendors to be given, to

31 Oct 25 Avail QRMP for Oct-Dec onwards.

31 Oct 25 TDS Statements for September quarter.

31 Oct 25 ?Furnishing declaration u/s 80GG in respect of the rent paid for residential accommodation (if the assessee is required to submit ITR by 31 Oct)

31 Oct 25 Furnishing of particulars for claiming relief u/s 89 (if assessee is required to submit return of income by October 31, 2025)

31 Oct 25 Filing of Income Tax returns by Cos, Partnership firms etc. (Audit applicable)

31 Oct 25 Filing of Tax Audit Report where due date of ITR is 31 Oct.

31 Oct 25 Filing of MAT/AMT Audit Report etc. where due date of ITR is 31 Oct.

31 Oct 25 Filing of Audit Report u/s 80JJAA(2) for additional employment where due date of ITR is 31 Oct.

31 Oct 25 Filing of other Audit Reports , where due date of ITR is 31 Oct.

31 Oct 25 Filing of Report u/s 92E for international transactions and specified domestic transactions.

31 Oct 25 Filing Tax Audit Report where due date of ITR is 30 Nov.

31 Oct 25 Filing MAT/AMT Audit Report etc. where due date of ITR is 30 Nov.

31 Oct 25 Filing Audit Report u/s 80JJAA(2) for additional employment where due date of ITR is 30 Nov.

31 Oct 25 Filing other Audit Reports where due date of ITR is 30 Nov.

31 Oct 25 Filing of Audit report by a fund or trust or institution or any university or other educational institution or any hospital or other medical institution?

31 Oct 25 Online Application by Domestic Co. (other than to whom transfer pricing provisions are applicable) for exercise of option u/s 115BAA (22% tax)

31 Oct 25 Online Application by new Manufacturing Domestic Co. (other than to whom transfer pricing provisions are applicable) filing ITR for first time, for exercise of option u/s 115BAB (15% tax).

31 Oct 25 Online Application by Individual/HUF carrying business / profession, for exercise of option u/s 115BAC(1), where due date of ITR is 31 Oct.

31 Oct 25 Online Application by resident co-operative society, for exercise of option u/s 115BAD(1) where due date of ITR is 31 Oct.

31 Oct 25 Statement of foreign income offered for tax for the previous year and of foreign tax deducted or paid on such income. (if due date of ITR is October 31).

31 Oct 25 Statement of tax deposited in relation to transfer of virtual digital asset u/s 194S by an exchange for September quarter.

31 Oct 25 Quarterly return of non-deduction at source by banks from interest on time deposit for September quarter.

31 Oct 25 E-filing of information of declarations in Form 60 received upto 30 Sep.

31 Oct 25 Statement of Financial Transactions by Depositories, Registrars & Share Transfer Agents for reporting of information relating to Capital gains on transfer of listed securities or units of Mutual Funds for Apr-Sep.

31 Oct 25 Furnishing of Annual audited accounts for each approved programmes u/s 35(2AA).