Taxpayers should note several important compliance deadlines during August 2026. By 7 August, taxes deducted or collected for July, along with STT and CTT, must be deposited. Certificates and government-related TDS/TCS statements are due on 14 and 15 August. 30 August is the deadline for filing Form 141 and the annual Advance Pricing Agreement compliance report in Form 3CEF. The key deadline is 31 August, covering specified income-tax returns, self-assessment tax payments, and various supporting declarations and certificates. Timely compliance will help taxpayers avoid interest, penalties, and other statutory consequences.
| 07-Aug-26 | ||
| Event | Applicable Act | Description |
| Form 127 | Income Tax Act, 2025 | Declaration under section 394(2) of the Act to be made by a buyer for obtaining goods without collection of tax received in the month of July, 2026 |
| Statutory Forms Filling Due Date | Income Tax Act, 2025 | Due date for deposit of Tax deducted/collected for the month of July, 2026. However, all sum deducted/collected by an office of the government shall be paid to the credit of the Central Government on the same day where tax is paid without production of an Income tax Challan |
| Securities Transaction Tax / Commodities Transaction Tax | Other Act | Securities Transaction Tax – Due date for deposit of tax collected for the month of July, 2026 |
| Securities Transaction Tax / Commodities Transaction Tax | Other Act | Commodities Transaction Tax – Due date for deposit of tax collected for the month of July, 2026 |
| 14-Aug-26 | ||
| Form 132 | Income Tax Act, 2025 | Due date for issue of Certificate under section 395(4) for tax deducted at source in the month of June, 2026 |
| 15-Aug-26 | ||
| Form 1 | Income Tax Act, 2025 | Monthly statement to be furnished by a stock exchange in respect of transactions in which client codes been modified after registering in the system for the month of July, 2026 |
| Form 133 | Income Tax Act, 2025 | Certificate under section 395(4) for tax collected at source for the quarter ending June 30, 2026 |
| Form 131 | Income Tax Act, 2025 | Certificate under section 395(4) for tax deducted at source other than on salary paid to an employee under section 392 or pension or interest income of specified senior citizen under section 393(1) for the quarter ending June 30, 2026 |
| Form 137 | Income Tax Act, 2025 | Due date for furnishing of Form 137 by an office of the Government for TDS/TCS Book Adjustment Statement for the month of July, 2026 |
| 30-Aug-26 | ||
| Form 141 | Income Tax Act, 2025 | Due date for furnishing of Challan-cum-statement of deduction of tax under section 393(1) [Table Sl. No. 2(i), 3(i), 6(ii) and 8(vi)] in the month of July, 2026 |
| Form 3CEF | Income Tax Act, 1961 | Annual Compliance Report on Advance Pricing Agreement (if due date of submission of return of income is July 31, 2026) |
| 31-Aug-26 | ||
| All income tax returns except ITR-1, 2 and 6 | Income Tax Act, 1961 | Return of income for the Assessment Year 2026-27 in the case of assessee (a) non-corporate assessee (having income from business or profession and whose books of account are not required to be audited under Income Tax Act, 1961 or under any other Act) or (b) working partner of a firm whose accounts are not required not to be audited under this Act or under any other Act or the spouse of such partner if the provisions of section 5A applies to such spouse or |
| All income tax returns except ITR-1, 2 and 6 | Income Tax Act, 1961 | Payment of Self Assessment Tax (if due date of submission of return of income is August 31, 2026 |
| Form 56FF | Income Tax Act, 1961 | Particulars to be furnished under clause (b) of sub-section (1B) of section 10A of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026) |
| Form 10CCD | Income Tax Act, 1961 | Certificate under sub-section (3) of section 80QQB for authors of certain books in receipt of royalty income, etc. (if due date of submission of return of income is August 31, 2026) |
| Form 10CCE | Income Tax Act, 1961 | Certificate under sub-section (2) of section 80RRB for Patentees in receipt of royalty income, etc. (if due date of submission of return of income is August 31, 2026) |
| Form 10FC | Income Tax Act, 1961 | Authorization for claiming deduction in respect of any payment made to any financial institution located in a Notified jurisdictional area. (if due date of submission of return of income is August 31, 2026) |
| Form 3CFA | Income Tax Act, 1961 | Form for opting for taxation of income by way of royalty in respect of Patent (if due date of submission of return of income is August 31, 2026) |
| Form 3CT | Income Tax Act, 1961 | Income attributable to assets located in India under section 9 of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026 |
| Form 10BBC | Income Tax Act, 1961 | Certificate of accountant in respect of compliance to the provisions of clause (23FE) of section 10 of the Income-tax Act, 1961 by the notified Pension Fund |
| Form 10BBD | Income Tax Act, 1961 | Statement of eligible investment received (if due date of submission of return of income is August 31, 2026) |
| Form 5C | Income Tax Act, 1961 | Details of amount attributed to capital asset remaining with the specified entity (if due date of submission of return of income is August 31, 2026) |
| Form 10BA | Income Tax Act, 1961 | Declaration to be filed by the assessee claiming deduction under section 80GG (if due date of submission of return of income is August 31, 2026) |
| Form 10E | Income Tax Act, 1961 | Form for furnishing particulars of income under section 192(2A) for claiming relief u/s 89 (if due date of submission of return of income is August 31, 2026) |
| Form 10-EE | Income Tax Act, 1961 | Taxation of income from retirement benefit account maintained in a notified country (if due date of submission of return of income is August 31, 2026) |
| Form 10H | Income Tax Act, 1961 | Certificate of foreign inward remittance (if due date of submission of return of income is August 31, 2026) |
| Form 10IA | Income Tax Act, 1961 | Certificate of the medical authority for certifying person with disability, severe disability, autism, cerebral palsy and multiple disability for purposes of section 80DD and section 80U (if due date of submission of return of income is August 31, 2026) |
| Form 10-IEA | Income Tax Act, 1961 | Application for exercise of option under clause (i) of sub-section (6) of section 115BAC or withdrawal of option under the proviso to sub-section (6) of section 115BAC of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026) |
| Form 10IG | Income Tax Act, 1961 | Statement of Exempt income under clause (4D) of section 10 of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026) |
| Form 10IH | Income Tax Act, 1961 | Statement of income of a Specified fund eligible for concessional taxation under section 115AD of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026) |
| Form 10-II | Income Tax Act, 1961 | Statement of exempt income under clause (23FF) of section 10 of the Income-tax Act, 1961 (if due date of submission of return of income is August 31, 2026) |
| Form 10-IK | Income Tax Act, 1961 | Annual Statement of Exempt Income under sub-rule (2) of rule 21AJA and taxable income under sub-rule (2) of rule 21AJAA (if due date of submission of return of income is August 31, 2026) |
| Statutory Forms Filling Due Date | Income Tax Act, 1961 | Statement by scientific research association, university, college or other association or Indian scientific research company as required by rules 5D, 5E and 5F (if due date of submission of return of income is August 31, 2026 ) |
| Form 10 | Income Tax Act, 1961 | Statement to be furnished to the Assessing Officer/Prescribed Authority under clause (a) of the Explanation 3 to the third proviso to clause (23C) of section 10 or under clause (a) of sub-section (2) of section 11 of the Income-tax Act, 1961 (if the assessee is required to submit return of income on October 31, 2026) |
| Form 9A | Income Tax Act, 1961 | Application for exercise of option under clause (2) of the Explanation to sub-section (1) of section 11 of the Income – tax Act, 1961 (if the assessee is required to submit return of income on October 31, 2026) ) |
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