{"id":3189,"date":"2026-09-18T12:09:31","date_gmt":"2026-09-18T12:09:31","guid":{"rendered":"https:\/\/rnm.in\/blog\/?p=3189"},"modified":"2026-09-18T12:14:15","modified_gmt":"2026-09-18T12:14:15","slug":"september-2026-tax-calendar-important-income-tax-due-dates","status":"publish","type":"post","link":"https:\/\/rnm.in\/blog\/september-2026-tax-calendar-important-income-tax-due-dates\/","title":{"rendered":"September 2026 Tax Calendar: Important Income Tax Due Dates"},"content":{"rendered":"<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\">7<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Due date of Deposit of TDS\/ TCS for the Month of Aug, 2026<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">7<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Uploading of declarations received in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/form-no-127-1\"><b>Form No. 127<\/b><\/a><b>\u00a0<\/b><span style=\"font-weight: 400;\">(Income-tax Rules, 2026) from the buyer in the month of August, 2026<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">14<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Issue of certificate in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/form-no-132-1\"><b>Form No. 132<\/b><\/a><b>\u00a0<\/b><span style=\"font-weight: 400;\">(Income-tax Rules, 2026) under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 395(4)<\/span><\/a><span style=\"font-weight: 400;\">\u00a0of the Income-tax Act 2025 for tax deducted at source under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 393(1)<\/span><\/a><span style=\"font-weight: 400;\">\u00a0[Table Sl. No. 2(i), 3(i), 6(ii) &amp; 8(vi)] of the Income-tax Act, 2025 in the month of July, 2026<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">15<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">2<\/span><span style=\"font-weight: 400;\">nd<\/span><span style=\"font-weight: 400;\"> instalment of <\/span><b>advance tax<\/b><span style=\"font-weight: 400;\"> for the Tax Year 2026-27<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing report under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 115JB<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007874-pdf-4\"><b>Form No. 29B<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) for computing the book profits of the company during the previous year 2025-26 (if the assessee is required to submit return of income on October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing report under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 115JC<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007875-pdf-2\"><b>Form No. 29C<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) for computing Adjusted Total Income and Alternate Minimum Tax of the person other than company during the previous year 2025-26 (if the assessee is required to submit return of income on October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing of the report in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007769-pdf-2\"><b>Form No. 3CEA<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) relating to computation of capital gains in case of slump sale taxable under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 50B<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) (if the assessee is required to submit return of income on October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing of certificate in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103520000000087061-pdf-1\"><b>Form No. 10-IJ<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) issued by a Chartered Accountant certifying the annual statement of exempt income of the specified fund, being a category-III AIF, under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 10(23FF)<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) (if the assessee is required to submit the return of income on or before October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing of Audit Report in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007813-pdf-2\"><b>Form No. 10CCB<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) by assessee claiming deduction under section\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">80-I<\/span><\/a><span style=\"font-weight: 400;\">,\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">80-IA<\/span><\/a><span style=\"font-weight: 400;\">,\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">80-IB<\/span><\/a><span style=\"font-weight: 400;\">\u00a0or\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 80-IC<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) (if the assessee is required to submit the return of income on or before October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing report in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007823-pdf-4\"><b>Form No. 10DA<\/b><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Rules, 1962) certifying the claim for additional employee cost under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 80JJAA<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) during the previous year 2025-26 (if the assessee is required to submit return of income on or before October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Due date for filing of audit report <\/span><b>under\u00a0<\/b><a href=\"about:blank\"><b>section 44AB<\/b><\/a><b>\u00a0<\/b><span style=\"font-weight: 400;\">(Income-tax Act, 1961) for the assessment year 2026-27 in the case of a corporate-assessee or non-corporate assessee (who is required to submit his\/its return of income on October 31, 2026)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing of Audit report in\u00a0<\/span><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007797-pdf-4\"><b>Form No. 10B<\/b><\/a><b>\/<\/b><a href=\"https:\/\/www.incometaxindia.gov.in\/documents\/d\/guest\/103120000000007798-pdf-4\"><b>10BB<\/b><\/a><b>\u00a0<\/b><span style=\"font-weight: 400;\">(Income-tax Rules, 1962) by a fund or trust or institution or any university or other educational institution or any hospital or other medical institution<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">30<\/span><span style=\"font-weight: 400;\">th<\/span><span style=\"font-weight: 400;\"> Sep<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Furnishing audit report in <\/span><b>Form No. 3AC<\/b><span style=\"font-weight: 400;\"> (Income-tax Rules, 1962) by assessee claiming deduction under\u00a0<\/span><a href=\"about:blank\"><span style=\"font-weight: 400;\">section 33AB<\/span><\/a><span style=\"font-weight: 400;\">\u00a0(Income-tax Act, 1961) for the previous year 2025-26 (if the assessee is required to submit return of income on October 31, 2026)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; 7th Sep Due date of Deposit of TDS\/ TCS for the Month of Aug, 2026 7th Sep Uploading of declarations received in\u00a0Form No. 127\u00a0(Income-tax Rules, 2026) from the buyer in the month of August, 2026 14th Sep Issue of certificate in\u00a0Form No. 132\u00a0(Income-tax Rules, 2026) under\u00a0section 395(4)\u00a0of the Income-tax Act 2025 for tax deducted at source under\u00a0section 393(1)\u00a0[Table Sl.<\/p>\n","protected":false},"author":2,"featured_media":3194,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[446],"tags":[],"class_list":["post-3189","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-taxation-compliance"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>September 2026 Tax Calendar: Important Income Tax Due Dates<\/title>\n<meta name=\"description\" content=\"Check the September 2026 Tax Calendar for TDS\/TCS payments, advance tax, audit reports, tax certificates and other important income tax compliances.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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