India GST, TDS/TCS, and e-invoicing — handled automatically

India's GST is dual by design: every intra-state supply carries CGST plus SGST; every inter-state supply carries IGST instead. The rate depends on the HSN code for goods or the SAC code for services — and there are over 1,200 codes in common use across retail, manufacturing, and professional services. A miscoded supply means the wrong rate, wrong return, and wrong input tax credit for your buyer.

For businesses above the e-invoicing threshold, every B2B invoice must be uploaded to the Invoice Registration Portal to receive an Invoice Reference Number (IRN) and a digitally signed QR code before it reaches the buyer. Without the IRN, the invoice is not legally valid — your buyer cannot claim input tax credit on it. That upload must happen in real time, not as an end-of-day batch.

Then come the returns. GSTR-1 for outward supplies. GSTR-3B for net tax payments. GSTR-2B for auto-populated input credits. GSTR-9 annually. TDS under Section 194C, 194J, and others — each with deduction rates, thresholds, and quarterly challans. TCS under Section 206C on specified goods and services. On WiseLinkNow, none of this is manual. CGST/SGST/IGST applies automatically by supply type and buyer state. IRN is fetched at the moment of invoice generation. HSN and SAC codes are configured once per product. GSTR-1 data pre-populates. TDS and TCS are calculated, deducted, and tracked per vendor.