VAT made less annoying: rates, registration threshold, and quick tools to add or remove VAT from a price.
You usually must register if taxable turnover for the last 12 months goes above £90,000, or you expect to go above it in the next 30 days.
20% standard, 5% reduced, 0% zero rate. Some supplies are exempt instead of zero-rated.
Crossing the VAT threshold changes pricing, cash flow and admin — not just the headline rate you charge.