| Period | Due date | Form | Description |
| August 2023 | 10.09.2023 | GSTR 7 | Summary of Tax Deducted at Source (TDS) and deposited under GST laws |
| August 2023 | 10.09.2023 | GSTR 8 | Summary of Tax Collected at Source (TCS) and deposited by e-commerce operators under GST laws |
| August 2023 | 11.09.2023 | GSTR 1 | GST Filing of returns by a registered person with aggregate turnover exceeding INR 5 Crores during the preceding financial year or any registered person have opted to file monthly return |
| August 2023 | 13.09.2023 | GSTR 1 / IFF | Details of B2B Supply of a registered person with turnover upto INR 5 Crores during the preceding year and who has opted for quarterly filing of return under QRMP |
| August 2023 | 13.09.2023 | GSTR 6 | Details of Input Tax Credit (ITC) received and distributed by an Input Service Distributors (ISD) |
| August 2023 | 13.09.2023 | GSTR 5 | Summary of outward taxable supplies and tax payable by a non-resident taxable person |
| August 2023 | 20.09.2023 | GSTR 5A | Summary of outward taxable supplies and tax payable by a person supplying OIDAR services |
| August 2023 | 20.09.2023 | GSTR 3B | GST Filing of returns by a registered person with aggregate turnover exceeding INR 5 Crores during the preceding financial year |
| August 2023 | 25.09.2023 | PMT 06 | : Payment of GST by Registered person opted to file return under QRMP Scheme |
| August 2023 | 28.09.2023 | GSTR 11 | Statement of inward supplies received by persons having Unique Identification Number (UIN) |
