Invoice Mitra is a free GST toolkit for Indian freelancers, shops, SME and MSMEs not a single invoice form. Create a GST invoice with no signup, then stay on the same site for the rest of the work: • GST invoice + quotation + WhatsApp PDF • Auto CGST / SGST / IGST, HSN/SAC, GSTIN check • GST, reverse GST, TDS, 44ADA, advance tax • UPI QR + UPI MDR calculator (0.4% fee from 15 Oct 2026) • E-way bill, payment reminder, freelance rate, P&L Unlimited use. No watermark. Data stays in the browser.