GST Filing Software Mumbai — GSTR-1 GSTR-3B E-Invoice 2026

GST Filing Software Mumbai — GSTR-1 GSTR-3B E-Invoice 2026

Mumbai's vast commercial ecosystem — traders in Dharavi and Bhiwandi, manufacturers in Thane and Navi Mumbai, service companies in Lower Parel and BKC, restaurateurs in Bandra and Juhu — all share one universal compliance requirement: GST. With over 5 lakh GST-registered businesses in Mumbai and Maharashtra being the state with the highest GST collections nationally, compliance is both critical and demanding.

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Mumbai's GST Compliance Landscape

Mumbai's business diversity creates unique GST challenges:

Traders and Distributors (Dharavi, Bhiwandi, Kurla)
- High transaction volume: 500-5,000 invoices per month
- E-way bill mandatory for goods above Rs. 50,000 in transit
- GSTR-2B reconciliation with multiple suppliers
- Maharashtra within-state (intra-state) CGST + SGST billing

Manufacturers (Thane, Navi Mumbai, Ambernath)
- E-invoice mandatory above Rs. 5 crore turnover
- HSN-level reporting in GSTR-1
- Job work provisions for contract manufacturing
- Export invoices and LUT filing for Nhava Sheva port exports

Financial Services (BKC, Nariman Point)
- GST on financial services: exempt vs. taxable mix
- Input service distributor (ISD) for multi-branch companies
- Reverse charge on imported services

Restaurants and Hospitality
- 5% GST without ITC for restaurants
- 18% GST with ITC for hotels above Rs. 7,500 room rate
- Complex split between food and accommodation

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MICS GST Software Features for Mumbai

GSTR-1 Automation
- Sales data imported from accounting system (Tally, ERP, Excel)
- Auto-classification: B2B, B2C large, B2C small, exports, nil-rated
- Invoice-level matching with e-invoice portal (IRP)
- File directly to GST portal via API — no manual upload
- Error validation before filing: catches GSTIN errors, tax calculation errors

GSTR-3B Filing
- Tax liability auto-computed from GSTR-1 data
- ITC auto-populated from GSTR-2B
- Comparison: GSTR-2B available ITC vs. proposed claim
- Officer-specific computation for reverse charge, ITC reversal
- File and pay in one workflow

E-Invoice Generation
- Integration with IRP (Invoice Registration Portal)
- IRN (Invoice Reference Number) generated in real-time
- QR code embedded on invoice
- Cancellation within 24 hours if needed
- Mandatory above Rs. 5 crore turnover — Mumbai companies hit this threshold frequently

E-Way Bill
- Auto-generated from sales invoice for goods above Rs. 50,000
- Bhiwandi to Mumbai intra-state e-way bill: 1 day validity per 100 km
- Inter-state (Maharashtra to Gujarat, Maharashtra to Karnataka): 1 day per 200 km
- Extension workflow for delayed shipments

GSTR-2B Reconciliation
- Download GSTR-2B automatically via API (after 14th of each month)
- Purchase register vs. GSTR-2B matching: invoice by invoice
- Mismatch report: supplier not filed, amount difference, GSTIN mismatch
- Supplier follow-up email templates

Maharashtra SGST Specific
- Maharashtra SGST rate handling: same as central GST
- Maharashtra Settlement Commission provisions
- MH GST department notices and responses

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GST Compliance Calendar for Mumbai Businesses

| Due Date | Return | Applicable To |
|---|---|---|
| 11th of each month | GSTR-1 | All regular taxpayers (monthly) |
| 13th of each month | GSTR-1 (IFF) | Quarterly filers (invoice furnishing facility) |
| 20th of each month | GSTR-3B | All regular taxpayers |
| 25th of each month | GST payment | QRMP taxpayers |
| 14th of each month | GSTR-2B available | For reconciliation |
| December 31 | GSTR-9 | Annual return (previous year) |

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Common GST Mistakes by Mumbai Businesses

- E-invoice not generated: Mumbai companies crossing Rs. 5 crore often unaware — penalties apply
- GSTR-1 filed late: Interest on tax liability + late fees
- ITC claimed beyond GSTR-2B: Automated scrutiny notices from GST department
- Reverse charge missed: On import of services (AWS, Google ads — foreign vendors)
- E-way bill expired: Goods detained by GST inspector at Thane/Mumbai checkpost

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Pricing for Mumbai Businesses

| Package | Monthly Cost |
|---|---|
| GST filing only (GSTR-1 + GSTR-3B) | Rs. 3,000 |
| GST + E-invoice (above Rs. 5 crore) | Rs. 5,000 |
| Full GST compliance (all returns + reconciliation) | Rs. 8,000 |
| Enterprise (multiple GSTINs across Maharashtra) | Rs. 15,000 |

Free GST demo for Mumbai businesses: +91 9355273535 | admin@mics.asia