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.

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

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

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) |

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

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