GSTFiling - Auto-file GSTR-1 from Amazon, Flipkart & Meesho sales data

Hey Product Hunt! 👋 I'm Ritu, a full-stack dev (currently interning at STAQO by Sheela Foam) and CS student at VIT Bhopal. GSTFiling is my first solo product, and I'm excited to finally launch it here. The problem: If you sell on Amazon, Flipkart, and Meesho, each platform gives you a sales/TCS report in a completely different spreadsheet format. Reconciling all three by hand into one GSTR-1 return took me and every seller I talked to hours every month — and one wrong number means a mismatch with the GST portal. What I built: GSTFiling parses each platform's report independently, merges them into one canonical GSTR-1 (all the tables — B2B, B2CL, B2CS, HSN, CDNR, etc.), and exports a portal-ready JSON file plus a reviewable Excel workbook. There's also a standalone TCS reconciliation report, and a handful of free tools (HSN code search, GSTR-1 JSON validator, Excel/JSON converter, invoice generator) that don't need an account. 🎉 Independence Day Offer: Every plan, every feature, unlocked free — no card required — from 15 Aug to 31 Dec 2026. A few honest notes: this is a young product and I'm actively iterating — a couple of dashboard filters and one legacy report page still need cleanup, and I'd genuinely rather you hit them and tell me than not know. If you're an e-commerce seller (or an accountant filing for one), I'd love your feedback — especially on the GSTR-1 output accuracy, since that's the part that has to be exactly right. Thanks for checking it out! 🙏