Products / India Tax & GST Helper

India Tax & GST Helper Coming soon

Exact calculators for common Indian tax and GST tasks, used from inside ChatGPT or Claude. Every answer shows its assumptions, the rules and financial year used, and its sources.

What it does

Income tax

Compare the old and new regimes for an individual for FY 2026-27 (AY 2027-28) or FY 2025-26: standard deduction, rebate with marginal relief, surcharge with marginal relief, 4% cess and common old-regime deductions (80C, 80D, NPS, home-loan interest, HRA).
Work out the HRA exemption (least of the three limits, metro or non-metro).
Estimate monthly TDS on salary, and look up or estimate TDS on common payments such as interest, contractors, commission, rent and professional fees.

GST

Check a GSTIN's format, state code and check character offline. This does not prove the GSTIN is registered or active.
Check HSN/SAC code format and see the GST rate for a small curated list of common codes (always marked "verify").
Generate a GST tax invoice (PDF and HTML) from seller, buyer and line items: CGST+SGST or IGST from the place of supply, round-off, amount in words, and a checklist of Rule 46 particulars. It is not an e-invoice (no IRN/QR).

Where it will be available

Assistant	Planned listing	Status
ChatGPT	"India Tax Calculator" and "GST Invoice Helper"	Not yet submitted
Claude	"India Tax & GST Helper" (connector and plugin)	Not yet submitted

We will update this page when a listing is approved. Until then, there is nothing to install.

Limits

Individuals only; salary-type income plus simple other income. No capital gains, business income, filing, e-invoices, GST portal lookups, exports/SEZ, composition bills or credit notes.
Rules and rates change. Results are estimates and convenience documents, not tax, legal or accounting advice. Check with a Chartered Accountant or GST practitioner before you file, deduct tax or issue an invoice.

Your data

The tools compute the answer from what your assistant sends and keep no copy of your inputs or results. Please do not enter PAN, Aadhaar, card or bank details, passwords or OTPs; the service rejects such text. We keep anonymous usage counts only. Details: privacy policy, terms, support.