| Date | Category | Compliance for (Due dates) | Form/
Challan no: |
| 7 | Income tax | Deposit of TDS/TCS for October 2019 | ITNS 281 |
| 11 | GST | GSTR 1 for furnishing outward supplies for October 2019(Turnover exceeding Rs. 1.50 Cr or opted to file monthly Return) | GSTR 1 |
| 11 | ESIC | ESI half yearly return filing | ECR |
| 14 | Income tax | Issue of TDS Certificate for tax deducted u/s 194-IA &194-IB in September, 2019 | 16B & 16C |
| 15 | Income tax | ​Quarterly TDS certificate (in respect of tax deducted for payments other than salary) for the quarter ending September 30, 2019 | |
| 15 | EPF | EPF Remittance & return filing for October 2019 | ECR |
| 15 | ESIC | ESI Remittance for October 2019 | ECR |
| 20 | GST | Monthly GST Return and GST payment for October 2019 | GSTR 3B |
| 30 | Income tax | Furnishing of challan-cum-statement in respect of tax deducted u/s 194-IA & 194-IB in October, 2019 | 26QB & 26QC |
| 30 | Income tax | ​Annual return of income for the assessment year 2019-20 in the case of an assessee, if he/it is required to submit a report under section 92E pertaining to international or specified domestic transaction(s) | |
| 30 | Income tax | Report to be furn​ished in Form 3CEB in respect of international transaction and specified domestic transaction | Form 3CEB |
| 30 | Income tax | ​Due date for claiming foreign tax credit, upload statement of foreign income offered for tax for the previous year 2018-19 and of foreign tax deducted or paid on such income (if due date of submission of return of income is November 30, 2019).​​ |  Form no. 67 |
| 30 | GST | The annual return by taxpayers under GST (other than those opted for the Composition Scheme) for FY 2017-18 – Optional for those who have turnover upto 2 crore | GSTR 9 |
| 30 | GST | Filing of statement of reconciliation between GSTR-9 filed for a FY and the figures as per the audited annual Financial Statements of the taxpayer. | GSTR 9C |
| 30 | MCA | Extended due date for filing of Annual Accounts of companies | AOC 4 |