About Optotax GST
What is Optotax GST?
Optotax is a GST compliance platform for CAs, tax consultants and professionals in India that brings GST reconciliation, notice management, challan management and return filing into one dashboard. It reconciles GSTR-1, GSTR-3B, GSTR-2A and GSTR-2B against a client's purchase and sales data to identify mismatches by supplier, rate and date range, and it offers more than 20 downloadable reports for audits, input tax credit tracking and notice replies. Optotax auto-fetches GST notices from the portal and manages the full notice lifecycle with documentation trails. It also lets professionals create, pay and track challans across multiple GSTINs and file monthly, quarterly and annual GST returns. Optotax says return filing costs nothing on its platform, and users can sign up free or request a demo.
Who is Optotax GST for?
Optotax is for Chartered Accountants, tax consultants and GST professionals in India who manage GST compliance, reconciliation and notices across many clients and GSTINs.
What type of software is Optotax GST?
Optotax GST is listed under GST & Compliance.
What are Optotax GST's core capabilities?
Optotax covers four GST workflows. GST reconciliation and smart reports match GSTR-1, GSTR-3B, GSTR-2A and GSTR-2B against books, show mismatches supplier-wise, rate-wise and by date range, spot mismatch trends across clients or GSTINs, and provide more than 20 downloadable reports for audits, ITC tracking and notice replies. GST notice management auto-fetches notices from the portal, tracks and records replies with full documentation trails, links replies to reconciled data and supporting reports, maps replies to orders and related challans, and sends calendar reminders to avoid penalties. GST challan management creates, manages and pays challans across multiple GSTINs, tracks payment status and history back to July 2017, and links challans to notices or returns. GST return filing lets users file GSTR-1 and GSTR-3B with zero platform fees, auto-populating data from books and reconciliation reports with built-in validations.
- 100% free cloud access for CAs with unlimited client GSTIN support
- Fast multi-client GSTR-2B reconciliation with Excel import/export
- Direct Tally integration for bulk sales and purchase register sync
Answers above are based on Optotax GST's website, read on 6 Oct 2026.
- Deployment
- Cloud / Web-based
- GSP Status
- ASP / GSP Integrated
- Tally Integration
- Direct Tally Connector
- Multi-User Support
- Multi-staff login access
- Reconciliation Speed
- Up to 5,000 invoices/minute
Who makes Optotax GST?
Optotax was originally built by Optobizz Software Private Limited (founded 2017, Hyderabad), which was acquired by OPEN (OPEN Financial Technologies Private Limited) for $5M in Feb 2021 (Inc42) — all Optobizz staff moved to OPEN, and Optobizz has since been struck off the ROC register (Tracxn/thecompanycheck). Optotax today operates as a product/brand of OPEN, whose own site states "Built by OPEN. Backed by Experts." Previously-recorded "Optotax India Private Limited" does not appear to exist as a registered entity.
What CAs are saying about Optotax GST
Optotax GST has no reviews on SoftwaresForCA yet.
Screenshots
Key features
- ✓GSTR-1 Direct Filing & Auto-Preparation
- ✓GSTR-3B Auto-Computation & Filing
- ✓CMP-08 Composition Scheme Filing
- ✓Automated GSTR-2B/2A Auto-Download & Purchase Register Reconciliation
- ✓Duplicate Invoice & Discrepancy Detection
- ✓Departmental Notice Tracking & ASMT-10 / DRC-01 Reply Assistant
- ✓GST PMT-06 Challan Auto-Generation & Payment Tracking
- ✓CA Firm Multi-GSTIN & Multi-Client Central Dashboard
- ✓Statutory Audit Trail & Local/Cloud Client Data Security
Show 23 more items (not supported or not yet verified)
- ?GSTR-1A Amendment Support
- ?GSTR-9 Annual Return Auto-Preparation
- ?GSTR-9C Reconciliation Statement & Audit Tables
- ?IFF (Invoice Furnishing Facility) Filing
- ?ITC-04 Job Work & Other Returns (GSTR-4/5/6/7/8/10/11)
- ?Fuzzy & Multi-Parameter Invoice Matching (Prefixes, Dates, Rounding)
- ?Multi-Month & Cross-Financial Year Reconciliation
- ?Supplier Missing Invoice & Default Communication (WhatsApp/Email)
- ?ITC Eligibility & Ineligibility Classification
- ?Section 17(5) Blocked Credit Auto-Segregation
- ?Rule 37 & 37A ITC Reversal Tracking (180-Day & Supplier Default)
- ?Rule 42 & 43 Capital Goods ITC Reversal Calculation
- ?ITC Reclaim Tracking (Re-crediting Paid Invoices)
- ?RCM (Reverse Charge Mechanism) Computation & Liability Push
- ?Section 50 GST Interest & Late Fee Auto-Calculation
- ?GST Electronic Ledgers (Cash, Credit, Liability) Auto-Fetch & Reconciliation
- ?Direct NIC IRP E-Invoicing Suite (IRN, QR Code, Cancellation & Notes)
- ?Automated E-Way Bill Generation, Vehicle Update & Extension
- ?GST Refund Management (RFD-01 Statement & Export Calc)
- ?Direct GSTN GSP / ASP High-Speed API Integration
- ?TallyPrime, BUSY & Native ERP 2-Way Sync
- ?Universal Multi-Column Excel / CSV / JSON Flexible Mapper
- ?Bulk Multi-Client Return Filing & Auto-Fetch Queue
Pricing
- 100% Free Cloud Software for CA Firms & Tax Practitioners
Optotax provides a 100% free platform for CAs without limits on client GSTINs or return counts. Premium add-ons available for enterprise API access and dedicated phone support.
From the vendor's published pricing as of 25 Sept 2026. Confirm current prices with the vendor.
Limitations to know
- Customer support is predominantly via tickets and chat on free tiers
- Advanced enterprise ERP API connectors are limited compared to paid GSPs