GST Return Filing
GST Return Filing made easy with CASYST expert assistance.
Regular GST return filing keeps your registration active and your input tax credit intact. Late or wrong filings attract fees and interest, so accuracy matters. CASYST prepares, reconciles and files your returns on time, every month or quarter.
What is GST Return Filing?
Every registered taxpayer must file periodic GST returns, generally GSTR-1 for outward supplies and GSTR-3B for the summary return and payment of tax, on the due dates. Businesses opting for the QRMP scheme file on a quarterly basis with monthly payments.
Returns are matched against your suppliers' filings, so mistakes can block your input tax credit or attract notices.
Who needs GST Return Filing?
- All GST-registered businesses
- E-commerce sellers
- Businesses with input tax credit claims
- Companies that want error-free, reconciled returns
Benefits of GST Return Filing
On-time compliance
Avoid late fees and interest.
Input credit protection
Reconcile purchases so you claim every eligible credit.
Fewer notices
Accurate returns reduce mismatches and queries.
Time saved
Focus on your business while we file.
Expert review
A professional checks each return before filing.
Eligibility
- All registered taxpayers must file returns
- Returns are monthly or quarterly depending on turnover and scheme
- Filing is required even where there is no activity
- GST portal access and authorised signatory details are needed
Documents required
- GST portal login details
- Sales invoices and credit or debit notes
- Purchase invoices
- Bank statements
- Details of stock and opening balance
- Previous returns and pending notices
GST Return Filing process
- 1Step 1
Share data
You send sales and purchase records at the agreed intervals.
- 2Step 2
Reconcile
We reconcile your purchases with the GST portal data.
- 3Step 3
Prepare returns
We prepare GSTR-1 and GSTR-3B.
- 4Step 4
Your approval
You review and approve the return summary.
- 5Step 5
File and pay
We file the return and support the tax payment.
- 6Step 6
Acknowledgement
You receive the filing acknowledgement and status.
Deadlines and penalties
- Late fees apply per day of delay
- Interest applies on unpaid tax
- Mismatches can block input credit
- Repeated non-filing can lead to cancellation
- We track every due date for you
Types of GST returns
| Return | What it reports |
|---|---|
| GSTR-1 | Outward supplies |
| GSTR-3B | Summary return and tax payment |
| GSTR-9 | Annual return |
| GSTR-9C | Reconciliation statement |
| CMP-08 | Composition taxpayers' quarterly payment |
Monthly and yearly requirements
| Return | Frequency |
|---|---|
| GSTR-1 | Monthly, or quarterly under QRMP |
| GSTR-3B | Monthly, or quarterly with monthly payment |
| GSTR-9 | Yearly |
Common mistakes we prevent
- Mismatch between GSTR-1 and GSTR-3B
- Claiming ineligible input tax credit
- Wrong HSN or tax rate
- Missing the due date
Consequences of late or wrong filing
Late filing attracts fees and interest, and errors can block input credit or trigger notices. Repeated non-filing can lead to cancellation of the registration.
Related services
GST Return Filing cost
Our GST Return Filing package starts from ₹499. Government fees, stamp duty and other statutory charges are separate and depend on your state and the exact filing involved. We give you a clear, itemised quote before we start, with no hidden charges.
Get a QuoteGST Return Filing checklist
- Share data
- Reconcile
- Prepare returns
- Your approval
- File and pay
- Acknowledgement
Frequently asked questions
They depend on your turnover and scheme. Monthly and quarterly returns each have set due dates, which we track for you.
Late fee and interest apply, and your input credit can be affected.
Yes, a nil return must still be filed.
A scheme for small taxpayers to file returns quarterly with monthly tax payments.
Corrections are generally made in a later return, so accuracy in the first filing matters.
Ready to register GST Return Filing?
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