| Source | Particulars | Date of filing | Extended to |
| Circular No. 08/2021 dated 30th April 2021 | Appeal to Commissioner under Chapter XX | 1st April 2021 or thereafter | 31st May 2021 |
| Circular No. 08/2021 dated 30th April 2021 | Objections to Dispute Resolution Panel (DRP) under Section 144C | 1st April 2021 or thereafter | 31st May 2021 |
| Circular No. 08/2021 dated 30th April 2021 | Income-tax return in response to notice under Section 148 | 1st April 2021 or
thereafter |
31st May 2021 |
| Circular No. 08/2021 dated 30th April 2021 | Filing of belated return and revised return u/s 139 for AY 2020-21 | on or before 31st March 2021 | 31st May 2021 |
| Circular No. 08/2021 dated 30th April 2021 | Payment of tax deducted under Section 194-IA, Section 194-IB and Section 194M and filing of challan-cum-statement | by 30th April 2021 | 31st May 2021 |
| Circular No. 08/2021 dated 30th April 2021 | Statement in Form No. 61, containing particulars of declarations received in Form No.60 | on or before 30th April 2021 | 31st May 2021 |
| Source | Particulars | Previously extended to | Now extended to |
| Circular No. 05/2021 dated 25th April 2021 | Reporting under clause 30C and clause 44 of the Tax Audit Report (Form 3CD) was kept in abeyance | 31st March, 2021 | 31st March, 2022 |
| The timeline to update UDIN of past uploads of audit report and certificates | 30th April 2021 | 30th June, 2021 | |
| Last date to link PAN with Aadhaar | 31st March, 2021 | 30th June, 2021 |