TDS — the deduction is a dated rule, and the threshold is per year
The rates and thresholds are rows with effective dates; the year's aggregate is what the threshold is tested against; every deduction, challan and the 26Q rows are reports.
Tax deducted at source is the tax the hotel holds back from what it pays a vendor and hands to the Income Tax department on their behalf: 2% of a contractor's bill (1% if the contractor is a person), 10% of a professional's fee, 10% of the rent, 2% of a commission. It is due by the 7th of the next month (30 April for March), and a statement naming every deductee goes in every quarter (Form 26Q).
The rules are rows, not constants. *Reports → TDS rules* lists every section as the statute has it — rate, the 20% rate for a vendor with no PAN (206AA), the single-bill threshold and the year's threshold — each with the date it took effect. When the Finance Act changes a rate, the group adds its own row with the new date; the old one is not edited, so last year's bills still read last year's rule. A vendor with a lower-deduction certificate from their assessing officer (section 197) is recorded with the certificate's rate and validity, and that rate is used ahead of the rule.
The threshold is per year, and it is the aggregate. Section 194C applies when one bill passes ₹30,000 *or* when the year's bills to that vendor pass ₹1,00,000 — and at that moment the whole year's amount becomes deductible, not just the bill that tipped it. So every amount under a section is recorded, deducted or not; the first bill that crosses the year's line carries the catch-up, and the reason on the row says so in words.
The month's deductions are paid on one challan per section. *Reports → TDS liability* shows each month and section: deducted, paid, outstanding, the due date, and OVERDUE when it has passed. Recording the challan (BSR code, number, day paid) marks that month's deductions paid; the amount must equal the month's deductions under the section — a short challan is a second challan for the rest, and a wrong deduction is reversed first. *TDS entries* is every row; *26Q rows* is the deductee statement the CA's return utility takes, with the challan against each.
Where the deductions come from. A vendor's bill (Payables → Bills) works out its own TDS from these rules the moment it is captured: the vendor's PAN decides the rate, the section on the bill (or the vendor's usual one) decides which rule, the year's earlier bills decide whether the threshold is crossed. The net payable on the bill is after TDS, and the deduction is a liability in the books until the challan is paid.