| Event Date | Act | Applicable Form | Obligation |
| 07/04/2019 | Income Tax | Challan No.ITNS-281 | Payment of TCS collected in March |
| 10/04/2019 | Goods and Service Tax | GSTR-8 | The due date for furnishing statement by e-commerce companies for the month of March 2019. |
| 10/04/2019 | Goods and Service Tax | GSTR-7 | Form GSTR-7 for the month of March 2019. |
| 13/04/2019 | Goods and Service Tax | GSTR-1 | Outward supplies of taxable goods and/or services for the Month of March 2019 turnover exceeding 1.5 Cr.) Monthly Return. |
| 13/04/2019 | Goods and Service Tax | GSTR-6 | Return for Input Service Distributor |
| 15/04/2019 | ESI | ECR | PF Payment for March 2019 |
| 15/04/2019 | ESI | ESI challan | ESIC Payment for March 2019 |
| 15/04/2019 | Income Tax | Form No. 15CC | Quarterly statement in respect of foreign remittances (to be furnished by authorized dealers) in Form No. 15CC for quarter ending March, 2019 |
| 15/04/2019 | Income Tax | Form no. 3BB | Due date for furnishing statement in Form no. 3BB by a stock exchange in respect of transactions in which client codes been modified after registering in the system for the month of March, 2019 |
| 18/04/2019 | Goods and Service Tax | GSTR-4 | Quarterly return for taxpayers opting for Composition Scheme. |
| 20/04/2019 | Goods and Service Tax | GSTR-5 & 5A | Summary of outward taxable supplies and tax payable by Non Resident taxable person & OIDAR. |
| 22/04/2019 | ROC | Form DPT-3 | Return for disclosure of details of outstanding money or loan received by company but not considered as deposits in terms of rule 2(1)(c) of the Companies (Acceptance of Deposits) Rules, 2014. |
| 23/04/2019 | Goods and Service Tax | GSTR-3B | GSTR return for the month of March 2019 |
| 25/04/2019 | ROC | Active Form INC -22 A | Every company incorporated on or before the 31st December, 2017 shall file the particulars of the company and its registered office, in e-Form ACTIVE |
| 30/04/2019 | ROC | e-form DIR 3 KYC | Application for KYC of Directors for the year ending 31.03.2019. |
| 30/04/2019 | Goods and Service Tax | TRAN-2 | Due date of TRAN-2 is extended for certain taxpayers who could not complete filing due to tech glitch. |
| 30/04/2019 | MSMED, 2006 | MSME Form I | Every Specified Companies(receiving supplies from Micro & Small whose outstanding dues exceed 45 days) to file details of all outstanding dues to Micro or Small enterprises suppliers for Oct to March in PY |
| 30/04/2019 | Goods and Services Tax | GSTR-1 | Registered persons with aggregate turnover up to Rs. 1.50 Crores for March quarter |
| 30/04/2019 | Income Tax | Challan No. ITNS-281 | Payment of TDS Deducted in March |
| 30/04/2019 | Income Tax | Form 26QB | Deposit of TDS/TCS of previous month on purchase of property |
| 30/04/2019 | Income Tax | Form 24G | Due date for furnishing of Form 24G by an office of the Government where TDS/TCS for the month of March, 2019 has been paid without the production of a challan |
| 30/04/2019 | Income Tax | Form No. 60 & form no. 61 | Due date for e-filing of a declaration in Form No. 61 containing particulars of Form No. 60 received during the period October 1, 2018 to March 31, 2019. |
| 30/04/2019 | Income Tax | Form. 15G/15H | Due date for uploading declarations received from recipients during the quarter ending March, 2019. |