The 10 TDS sections that cover 95% of business payments
Sec 192 (salary — computed on annual estimate), Sec 194A (interest other than securities @ 10%, threshold ₹40k / ₹50k for seniors), Sec 194C (contractor payments @ 1% individual / 2% others, threshold ₹30k single / ₹1L aggregate), Sec 194H (commission @ 5%, threshold ₹15k), Sec 194I (rent @ 10% land/building / 2% P&M, threshold ₹2.4L), Sec 194J (professional/technical fees @ 10% / 2%, threshold ₹30k).
Newer sections: Sec 194Q (purchase of goods > ₹50L from same seller @ 0.1%, buyer with turnover > ₹10 Cr), Sec 194R (perquisites/benefits in course of business @ 10%), Sec 194S (crypto/VDA transfers @ 1%), Sec 194T (partnership firm payments to partners > ₹20k, w.e.f. Apr 2025 @ 10%). Get any of these wrong and it's the deductor's liability under Sec 201.