GST Return Filing

Monthly and Quarterly GST Return Filing for Gujarat Businesses — Every GST-registered business in India owes a monthly or quarterly cycle of returns. The cost of missing one is never just the late fee. A missed GSTR-3B triggers an automatic 18% annual interest charge on the unpaid tax from the due date. A suspended GSTIN cannot issue invoices. It cannot generate e-way bills. It cannot claim input credits. The business is shut down until all returns are filed. For a Surat garment exporter, that suspension can hold up a shipment worth ₹5 lakhs. For a Rajkot agro-processor, it can break a cold chain at the worst possible moment.

FinTax24 runs the full GST return cycle from data collection through ARN confirmation. GSTR-1 is filed by the 11th of the following month. GSTR-3B is filed by the 20th. Every input tax credit is reconciled against GSTR-2B before the claim is made. Our monthly process catches missing supplier filings 2–3 days before the GSTR-3B deadline. You can follow up with your vendor and preserve your credit. Discovering the gap six months later in an audit notice is the alternative we help you avoid. For a Vadodara chemical manufacturer moving product across multiple states, IGST-versus-CGST-plus-SGST classification errors are the most common ITC mismatch cause. Our pre-file review catches these before they become notices.

The ₹499/month recurring fee covers GSTR-1 and GSTR-3B preparation and filing, GSTR-2B reconciliation, and same-day query handling. Businesses with turnover above ₹5 crore required to issue e-invoices also get IRP portal reconciliation. QRMP filers (turnover up to ₹5 crore) file quarterly GSTR-1 and monthly GSTR-3B with payment only. Annual GSTR-9 and GSTR-9C reconciliation statements are billed separately and filed by December 31. FinTax24 handles GST return filing for businesses across all 33 Gujarat districts plus Daman, Diu, and Dadra and Nagar Haveli. If a deadline is at risk, we tell you before it passes.

eCommerce Seller GST Filing for Amazon, Flipkart and Meesho Sellers in Gujarat

If you sell on Amazon India, Flipkart, Meesho, Myntra, or any other marketplace, your GST return cycle is the same as a regular business. GSTR-1 is by the 11th. GSTR-3B is by the 20th. But the compliance layer is different. Marketplaces deduct TCS under Section 52 and file GSTR-8 on your behalf. Your GSTR-1 outward supplies must reconcile with the TCS the marketplace reported. A mismatch between what you declared and what GSTR-8 shows is the fastest route to an ITC dispute and a departmental notice.

For a Surat textile seller on Flipkart, the peak-season compression is sharp. Flipkart Big Billion Days can generate a month's worth of sales in three days. GSTR-1 filed late or with incorrect HSN codes triggers a buyer's ITC rejection. For an Ahmedabad pharmaceutical distributor on Amazon, IGST-versus-CGST classification on interstate shipments is the live risk. The volume makes the error bigger than for a regular business. For a Rajkot readymade-garment seller on Meesho, return-window adjustments and marketplace fee deductions change the net tax payable every month. These must reflect in GSTR-3B.

FinTax24 files GST returns for eCommerce sellers across all Gujarat districts. Our process reconciles your marketplace settlement reports against GSTR-1 before filing. We flag TCS mismatches before the GSTR-3B deadline. We keep the GST portal and your books in sync. Single-store sellers on Amazon, Flipkart, or Meesho start at ₹699/month. Multi-store sellers operating on two or more marketplaces under one GSTIN see filing complexity scale with store count. They may qualify for our eCommerce GST bundle. The dedicated eCommerce Seller GST Return Filing service covers multi-marketplace reconciliation, quarterly TCS statements, and annual GSTR-9 preparation for online sellers.

Not Sure Which Returns You Owe? Check First, Then File

A late fee is entirely avoidable. The way to avoid it is to know the calendar before the month starts. The free GST return filing checker asks five questions. It returns the exact set of returns you owe with their frequency. If you have not registered yet, run the GST registration eligibility checker first. Then get the GSTIN before the first GSTR-3B falls due. Once you are live, use the GST late-fee and interest calculator to price what a missed due date would actually cost you. Use the input tax credit calculator to test whether a purchase is worth claiming before it lands in GSTR-2B.

Monthly Filing Across Gujarat's 33 Districts

The return itself is national — the same GSTR-1, the same GSTR-3B, the same GSTR-2B on every Gujarat business. What changes by district and by industry is where the errors come from, and that is where a Gujarat-based team earns its keep. FinTax24 runs the monthly cycle from Palitana in Bhavnagar district for businesses across all 33 districts, plus Dadra & Nagar Haveli and Daman & Diu.

• Diamond, gems and jewellery — Surat. Export-heavy units carry a tight tolerance on Table 6A. A supply booked in the wrong month, or an advance receipt reported in the wrong period, reverses against the next return. Reconciliation against the buyer's GSTR-2B — not a best-guess figure — is the only way the credit holds.
• Textiles, apparel and dyeing — Surat, Ahmedabad, Rajkot, Bhavnagar. Peak billing months compress the 11th and 20th deadlines into a few days of work. The 1st, 7th, 10th and 18th internal cut-offs below exist precisely so the filing is not produced in the last 48 hours.
• Chemicals and petrochemicals — Vadodara, Dahej, Sanand, Kutch. Inter-plant transfers are the classic IGST-versus-CGST-plus-SGST misclassification. It is the most common cause of IGST notices for a Gujarat manufacturer with plants in more than one state.
• Pharmaceuticals — Ahmedabad and Vadodara. Deferment-route exporters carry input credit in the electronic credit ledger rather than as cash. The 180-day supplier-payment window and the Section 16(2)(a) reversal both have to be tracked month by month. Or the credit reverses itself.
• Ceramics and building products — Morbi. Heavy freight and interstate dispatch mean a blocked-credit mistake on transport or packing shows up in the ledger long before it shows up in a notice.
• Agro, food processing and marine — Rajkot, Amreli, Junagadh, Porbandar, Bhavnagar, Jamnagar. Seasonality is the risk. One frozen or marine dispatch month can be a large multiple of the average. A nil return filed for it is a false nil that carries its own late fee and scrutiny.
• Engineering, foundry and ports — Rajkot, Ahmedabad, Jamnagar, Kutch, Bhavnagar. A job-work or GTA-heavy ledger needs the RCM register maintained every month. It has to be integrated with the GSTR-3B Table 3.1(d) filing.

Anand, Kheda, Dahod, Panchmahal, Narmada, Tapi, Navsari, Valsad, Mehsana, Patan, Banaskantha, Mahisagar, Aravalli, Sabarkantha, Gandhinagar, Botad, Devbhumi Dwarka, Gir Somnath and Surendranagar run on exactly the same monthly calendar and the same review steps. The difference is only in the sales and purchase mix that has to be reconciled. Every return we file comes back with the ARN. If a deadline is going to be tight we tell you before it, not after.

The Complete GST Return Filing Calendar for FY 2025-26

Every GST-registered taxpayer operates on a fixed monthly cycle with three to four key dates. For regular monthly filers: GSTR-1 (outward supplies) is due by the 11th of the following month. GSTR-3B (summary return with payment) is due by the 20th. Payment of net tax via GST PMT-06 challan is by the 20th, integrated with GSTR-3B. For QRMP filers (turnover up to ₹5 crore): GSTR-1 is due quarterly by the 13th of the month after the quarter ends. GSTR-3B is due monthly by the 22nd (for turnover up to ₹5 crore) or 24th (for first two months of the quarter), with payment only. For composition dealers: CMP-08 is filed quarterly by the 18th, with payment. The annual return GSTR-9 is filed by December 31 of the following financial year. GSTR-9C (reconciliation statement) is due by the same date for taxpayers with turnover above ₹2 crore. Missing any of these dates triggers late fees and interest. Late fee is ₹50/day for turnover above ₹5 crore and ₹25/day for others, capped at ₹10,000 per return. Plus 18% per year interest on unpaid tax. ITC reversals under Section 16(2)(a) (failure to pay supplier within 180 days) also come into play if not tracked.

GSTR-1 vs GSTR-3B: What Each Return Reports

GSTR-1 is the detailed outward supply return. It captures every tax invoice issued in the month. This includes B2B invoices, B2C invoices, credit notes, debit notes, advances, exports, and reverse charge supplies. B2B invoices go in Table 4 with the buyer's GSTIN. B2C invoices go in Table 5 by state and rate. Exports go in Table 6A with LUT details. GSTR-1 must match the invoices raised. Under e-invoicing, the invoices auto-populate from the IRP. The due date is the 11th of the following month for monthly filers, or 13th after the quarter ends for QRMP filers. Late or incorrect GSTR-1 filings disrupt buyers' ITC claims. Your customer cannot claim GST on an invoice you failed to report. This leads to commercial disputes.

GSTR-3B is the self-assessed summary return. It is much shorter: just six tables. Table 3.1 captures outward supplies and tax liability. Table 4 captures ITC claimed (auto-populated from GSTR-2B). Table 5 captures ITC reversed (for non-payment to supplier after 180 days, blocked credits, or non-business use). Table 6 captures ineligible ITC. Table 7 captures interest and late fees. The net tax payable is the difference between Table 3.1 and Table 4. GSTR-3B is the only return that triggers actual tax payment. Late GSTR-3B means unpaid tax, which accumulates 18% interest per year.

Input Tax Credit Reconciliation: GSTR-2A, GSTR-2B, and the Matching Process

Input Tax Credit (ITC) is the cornerstone of GST. A business can claim GST paid on inputs, input services, and capital goods as a credit against its output tax liability. This makes the effective tax rate zero on value addition. But ITC is not automatic. It must be matched with the supplier's GSTR-1 filing. The buyer has two statements to track: GSTR-2A (dynamic, auto-updated as suppliers file GSTR-1) and GSTR-2B (static, generated at month-end, locked in for that month's GSTR-3B claim). For any invoice in your purchase register but not in GSTR-2B, your supplier has not filed GSTR-1. Your ITC is at risk. The supplier must file GSTR-1 in time, and you must follow up. ITC is also blocked under Section 17(5) on personal consumption items, motor vehicles (with limited exceptions), food and beverages, club memberships, and other specified categories. Ineligible ITC must be reversed in GSTR-3B. FinTax24's monthly reconciliation tracks every invoice in your purchase register against GSTR-2B. It flags missing supplier filings 2–3 days before the GSTR-3B deadline. This ensures maximum ITC claim and minimum dispute.

Reverse Charge Mechanism and Its Impact on Return Filing

Under the Reverse Charge Mechanism (RCM), the recipient of certain specified supplies is liable to pay GST instead of the supplier. RCM applies to: services from unregistered persons, GTA (Goods Transport Agency) services, legal services from advocates, services from directors, renting from unregistered persons, and a few specific goods like used vehicles, leftover stone, and tobacco. The recipient must self-invoice the RCM supply on the date of payment or completion of service. Report the inward supply under RCM in GSTR-3B Table 3.1(d). Pay the tax in cash (not from ITC). ITC on the corresponding purchase is available in the same month, but only to the extent of the tax paid in cash. Common mistakes: failing to identify RCM supplies, paying tax from ITC (not allowed), and missing the 180-day re-reversal window when a supplier doesn't pay. FinTax24 maintains an RCM register for every client. It integrates the register into monthly GSTR-3B preparation.

Late Fees, Interest, and Penalty Schedule for Non-Compliance

The GST law has a graduated penalty structure. Late fee for GSTR-1, GSTR-3B, CMP-08: ₹50/day (₹25 CGST + ₹25 SGST) for turnover above ₹5 crore and ₹25/day (₹12.50 + ₹12.50) for others. Capped at ₹10,000 per return. Nil returns have a reduced fee of ₹20/day (₹10 + ₹10). Interest at 18% per year on the unpaid tax liability. Calculated from the day after the due date to the actual payment date. Penalty for non-filing: ₹10,000 or 10% of the tax due, whichever is higher, under Section 122. Continued non-filing leads to GSTIN cancellation. Penalty for ITC fraud: 100% of the fraudulent ITC claimed, plus interest and possible prosecution. Penalty for late GSTR-9: ₹200/day (₹100 + ₹100) for turnover above ₹5 crore, capped at 0.04% of turnover (max ₹25,000). For most small businesses, worst-case late fee plus interest for one missed return is ₹15,000–₹20,000. But the bigger risk is GSTIN cancellation, which halts business operations entirely.

Annual Return Filing: GSTR-9, GSTR-9C, and the Reconciliation Process

GSTR-9 is the annual return filed by December 31 of the following financial year (for example, GSTR-9 for FY 2025-26 is due by December 31 2026). It consolidates all monthly/quarterly GSTR-1 and GSTR-3B filings into a single annual reconciliation. The form has 19 tables covering outward supplies, ITC claimed and reversed, tax paid, refunds claimed, and transactions with composition dealers and UIN holders. GSTR-9C is a separate reconciliation statement comparing GST returns with audited financial statements. Required for taxpayers with aggregate turnover above ₹2 crore. Both GSTR-9 and GSTR-9C must be self-certified by the taxpayer. GSTR-9C must additionally be certified by a tax professional or cost accountant. The most common errors in GSTR-9 are mismatches between books and returns (especially for ITC reversals, advances, and credit notes), omitted exempt/nil/exempted supplies, and incorrect HSN summaries. FinTax24 prepares both GSTR-9 and GSTR-9C with a detailed reconciliation worksheet. We identify every mismatch and file correction returns before the deadline.

GSTR-1 Revision and Amendment Process

GSTR-1 can be revised any number of times before the due date of GSTR-3B for the same month. For example, GSTR-1 for October filed on November 10 can be revised up to November 20 (the GSTR-3B due date for October). After that, corrections go in the next month's GSTR-1 by adding or amending entries. There is no time limit for revising old GSTR-1s. You can correct April 2023 GSTR-1 in November 2024. But the difference will show in GSTR-2B of that month and the annual GSTR-9. GSTR-3B can also be revised, but only the tax payment and ITC claim tables (3.1, 4, 5, 6) are editable, not the basic information tables. Older revisions (before September 2021) can still be made for any month. Our recommendation: file original GSTR-1 on time with the best data available. Revise if corrections are needed before the GSTR-3B due date. Avoid filing original returns with known errors. Repeated revisions trigger departmental scrutiny.

Common GST Return Filing Errors and How to Avoid Them

Based on our filing process, the top errors that trigger notices or ITC loss are: (1) wrong HSN code — using 4-digit HSN when 6-digit is required, or vice versa, causing invoice mismatch with buyer's portal. (2) tax rate mismatch — applying 18% when 12% is correct, or missing IGST versus CGST+SGST distinction. (3) interstate vs intrastate confusion — classifying a supply as intrastate when the buyer is in a different state. This is the most common cause of IGST notices. (4) ITC claimed on blocked items — common with motor vehicles, food and beverages, and club memberships. (5) credit note timing — issuing credit notes in a different period than the original invoice, causing GSTR-1 mismatch. (6) advance receipt treatment — failing to declare advances received against future supply, which are taxable at receipt. Our process is a 3-step pre-file review: ERP data extraction, GSTR-2B reconciliation, and tax computation review before submission. This catches 99% of errors before they reach the portal.

How FinTax24 Handles Your GST Return Filing

Our monthly process is structured for zero-error filing. (1) Data collection: by the 1st of each month, you share your sales register, purchase register, and any bank/payment data. For businesses on Tally, Zoho Books, or QuickBooks, we can pull data directly. (2) Reconciliation: by the 7th, we reconcile your purchase register with GSTR-2B. We identify missing or mismatched supplier invoices. We email suppliers to file or correct their GSTR-1. (3) GSTR-1 preparation and filing: by the 10th, we file GSTR-1 with all invoices verified, credit notes reconciled, and HSN summaries aggregated. (4) GSTR-3B preparation: by the 18th, we compute tax liability, claim eligible ITC, reverse blocked or time-barred credits, and prepare the PMT-06 challan for net tax payable. (5) Filing and confirmation: by the 20th, GSTR-3B is filed, payment is made, and you receive the ARN receipt via WhatsApp. (6) Ad-hoc support: queries from suppliers, customers, or the department are handled same-day. Our strict monthly review process is designed to maintain accuracy and minimise errors at every step.