Expert GST Filing Consultant India | ISLF

For most Indian businesses, GST filing is a monthly exercise that should take hours but often takes days. The core challenge is reconciliation — matching your sales data with GSTR-1, reconciling purchase data with GSTR-2B, ensuring ITC claimed in GSTR-3B matches the auto-populated GSTR-2B, and identifying and correcting mismatches before they result in notices. For businesses with hundreds or thousands of invoices each month, manual reconciliation is error-prone and time-consuming.

The consequences of GST filing errors are tangible and escalating. Interest on delayed tax payment runs at 18% per annum. Late fees for GSTR-3B are ₹50 per day (₹20 for NIL returns). ITC mismatch notices (DRC-01) from the GST department require detailed invoice-level responses. For exporters, incorrect LUT filing or missed GSTR-1 filings can freeze IGST refunds — locking up working capital that businesses desperately need.

ISLF's GST filing consultancy service removes this burden from your team entirely. Our GST professionals handle your complete filing calendar — GSTR-1, GSTR-3B, GSTR-2B reconciliation, e-Way bill compliance, and annual returns — allowing your team to focus on business operations while we ensure your GST compliance is spotless.

ISLF's GST filing service begins with data collection. We work with clients' accounting systems (Tally, Busy, SAP, Zoho Books, QuickBooks) to extract transaction data in the required format. Our team then prepares GSTR-1 with accurate invoice-level outward supply details, HSN-wise summary, and nil-rated and exempted supply details. Filing is completed well before the due date (11th of the following month for quarterly filers, 13th for monthly filers) to avoid late fees.

GSTR-3B preparation involves computing the net tax liability after setting off ITC in the prescribed order (IGST first, then CGST, then SGST), computing reverse charge liability, and applying any eligible ITC from GSTR-2B. ISLF's team cross-checks the GSTR-3B liability against GSTR-1 outward supply data to catch any discrepancies before filing. For businesses with complex ITC structures (capital goods, blocked credits under Section 17(5), proportionate ITC for mixed supplies), ISLF provides a detailed ITC working to support the return.

For annual compliance, ISLF prepares GSTR-9 (annual return) by reconciling the monthly GSTR-1 and GSTR-3B data filed during the year against the audited financial statements. For businesses with annual turnover above ₹5 crore, GSTR-9C (reconciliation statement) is also prepared and certified. ISLF's annual return process includes a pre-filing reconciliation review that identifies and corrects any discrepancies that could otherwise trigger GST audit triggers.

E-Way Bill compliance is a critical but often overlooked aspect of GST filing. ISLF manages e-Way bill generation for all inter-state and qualifying intra-state consignments, ensuring that Part-A and Part-B details are correctly filled, the validity period is sufficient for the transport distance, and extensions are filed where transit delays occur. Non-compliance with e-Way bill requirements can result in goods seizure and penalties of 100% of the tax or 50% of the goods value — consequences ISLF helps you avoid entirely.

When the GST department issues notices — whether for ITC mismatch (DRC-01), demand for tax (DRC-01A), or for GST audit under Section 65 or 66 — ISLF's litigation support team prepares comprehensive, well-researched responses. We compile invoice-level evidence to justify ITC claims, prepare reconciliation statements to explain differences, and represent clients at personal hearings before GST officers.

ISLF also provides GST advisory for complex situations: whether GST applies to a specific transaction, how to structure a contract to optimize GST liability, whether services qualify as exports (zero-rated), and how to handle GST on imports of services under reverse charge. Our advisory opinions are backed by GST Act provisions, CBIC circulars, and advance rulings from various state AAR and AAAR benches.