| 07.10.2023 | FEMA | ECB-2 return for the month of Sep-23 (7 Working days from beginning of the month) |
| 07.10.2023 | IT | TDS/TCS payment for the month of Sep-23 |
| 10.10.2023 | GST | GSTR-7 (GST TDS) for the month of Sep-23 |
| 10.10.2023 | GST | GSTR-8 (GST TCS) for the month of Sep-23 |
| 11.10.2023 | GST | GSTR-1 for the month of Sep-23 (Other than QRMP) |
| 13.10.2023 | GST | GSTR-1 IFF (Invoice furnishing facility) for Sep-23 (QRMP scheme) |
| 13.10.2023 | GST | GSTR-6 (Return for Input Service Distributor) for the month of Sep-23 |
| 14.10.2023 | IT | Due date for issue of TDS Certificate for tax deducted under section 194-IA, IB & M, S in the month of Aug-23 |
| 14.10.2023 | ROC | Due date for filing of Appointment of Auditor in Form ADT-1 for AGM held on September 30, 2023 or within 15 days from the date of AGM for others. |
| 15.10.2023 | PF | PF payment for the month of Sep-23 |
| 15.10.2023 | PF | PF – ECR Filing for the month of Sep-23 |
| 15.10.2023 | ESI | ESIC payment for the month of Sep-23 |
| 15.10.2023 | IT | Quarterly statement of TCS deposited for the quarter ending September 30, 2023 |
| 15.10.2023 | IT | Quarterly TCS certificate in respect of tax collected by any person for the quarter ending June 30, 2023 |
| 15.10.2023 | IT | Quarterly TDS certificate (in respect of tax deducted for payments other than salary) for the quarter ending June 30, 2023 |
| 20.10.2023 | GST | GSTR-3B for the month of Sep-23 (Other than QRMP scheme). |
| 20.10.2023 | GST | GSTR-5 (Non-Resident Taxable Person) for the month of Sep-23 |
| 20.10.2023 | GST | GSTR-5A (OIDAR Services) for the month of Sep-23 |
| 25.10.2023 | GST | PMT-06 Challan for deposting tax (for taxpayers opting for quarterly GSTR 3B) |
| 29.10.2023 | ROC | Due date for filing of Annual Accounts (Standalone) in Form AOC-4/ AOC-4 XBRL for AGM held on September 30, 2023 or within 30 days from the date of AGM for others. |
| 29.10.2023 | ROC | Due date for filing of Annual Accounts (Consolidated) in Form AOC-4 CFS for AGM held on September 30, 2023 or within 30 days from the date of AGM for others. |
| 30.10.2023 | IT | Due date for furnishing challan-cum-statement in respect of tax deducted under section 194 IA, IB, M, S in the month of Sep 2023 |
| 30.10.2023 | ROC | The due date for filing of Statement of Account & Solvency and Charge of LLP in Form 8 for the financial year 2022-23 |
| 31.10.2023 | IT | Intimation by a designated constituent entity, resident in India, of an international group in Form 3CEAB for the accounting year 2022-23 |
| 31.10.2023 | IT | Intimation by a constituent entity, resident in India, of an international group in Form 3CEAC, the parent entity of which is not resident in India for the accounting year 2022-23 |
| 31.10.2023 | IT | Report to be furnished in Form 3CEB in respect of international transaction and specified domestic transaction. |
| 31.10.2023 | IT | Quarterly statement of TDS deposited for the quarter ending September, 2023 |
| 31.10.2023 | IT | Due date for filing of return of income for the assessment year 2023-24 if the assessee (not having any international or specified domestic transaction) is (a) corporate-assessee or (b) non-corporate assessee (whose books of account are required to be audited) or (c)partner of a firm whose accounts are required to be audited or the spouse of such partner if the provisions of section 5A apply |
| 31.10.2023 | IT | Audit report under section 44AB for the assessment year 2023-24 in the case of an assessee who is also required to submit a report pertaining to international or specified domestic transactions under section 92E. |
| 31.10.2023 | IT | Report under section 115JB for computing the book profits of the company in Form 29B, for the assessee having any international or specified domestic transaction, for the assessment year 2023-24. |
| 31.10.2023 | IT | Furnishing of Audit report in Form no. 10B/10BB by a fund or trust or institution or any university or other educational institution or any hospital or other medical institution. |
| 31.10.2023 | ROC | The due date for filing of Form MSME – I for the first half year of financial year 2023-24 |
