Nootus.CA
GSTR-1 · 2 · 3B · 9
GST

GST filing that's fast, accurate and end-to-end.

Automates GSTR preparation, mismatch detection, register intelligence, ITC reconciliation and notice drafting, powered by client-specific AI agents trained on GST skills, document skills and financial skills. Built for CA firms handling multiple clients at scale.

GSTR automation

Automated preparation of GSTR-1, 2, 3B & 9.

GSTR-1Outward supplies
GSTR-2Inward supplies, ITC validation
GSTR-3BMonthly summary return
GSTR-9Annual return

Auto-populate GSTR-1 from sales registers

Auto-populate GSTR-2 from purchase registers

Auto-compute ITC eligibility

Auto-prepare GSTR-3B from purchase/sales + ITC data

Auto-prepare GSTR-9 using full-year data

Auto-detect missing invoices

Auto-prepare supporting documents

1Upload purchase & sales registers
2AI agent extracts and classifies invoices
3AI agent prepares draft GSTR-1, GSTR-2, GSTR-3B, GSTR-9
4CA reviews and finalizes
5File directly from the platform
Mismatch detection

AI-driven detection of GST mismatches.

This reduces filing errors and improves compliance accuracy across every layer of the return.

GSTR-1 vs GSTR-3BGSTR-2 vs GSTR-3BBooks vs GST returnsPurchase register vs GSTR-2A/2BSales register vs GSTR-1ITC claimed vs ITC availableInvoice-level discrepancies
Highlight mismatches
Suggest corrections
Auto-prepare mismatch reports
Auto-identify missing invoices
Auto-detect duplicate entries
Purchase & sales register intelligence

AI agents that understand registers like a CA.

  • Read purchase and sales registers
  • Identify GST-relevant fields
  • Classify invoices
  • Detect missing GSTIN, invoice numbers, or tax rates
  • Map invoices to GSTR-1, GSTR-2, and GSTR-3B
  • Compute taxable value and tax amounts
  • Identify ITC eligibility
Advanced intelligence

This creates a clean, structured dataset for GSTR automation.

Auto-detect B2B vs B2CAuto-identify RCM transactionsAuto-flag incorrect tax ratesAuto-prepare monthly register summaries
Notice drafting

AI-assisted drafting for GST notices.

Drafts are CA-grade and ready for review.

GSTR-1 mismatchesGSTR-2 / ITC mismatch noticesGSTR-3B discrepanciesAnnual return clarificationsAudit-related queries
Read & interpret notices
Extract required fields
Draft responses
Prepare supporting documents
Suggest corrective actions
Full feature list

Everything in the GST module.

Core features
Automated GSTR-1, GSTR-2, GSTR-3B, GSTR-9Purchase/sales register intelligenceMismatch detectionITC reconciliationInvoice classificationError detection & correction suggestionsNotice reading & draftingAI-assisted draftingMulti-client management for CA firmsIntegration with Books, TDS, Income Tax modules
Advanced features
Auto-detect RCM transactionsAuto-identify incorrect tax ratesAuto-prepare monthly summariesAnnual GST compliance automation

Experience AI-Driven GST Automation

See GSTR-1 through GSTR-9 prepared, reconciled and filed with client-specific AI agents doing the heavy lifting.