Sales tax insights
Long-form guides on reverse sales tax, USA state rates, online shopping, SaaS taxability, and bookkeeping—reviewed by our editorial team and built for real-world receipts.
How to Reverse Calculate Sales Tax (Step-by-Step)
Learn how to reverse calculate sales tax from any receipt total — with real examples, common mistakes, and a free calculator.
USA Sales Tax Rates by State (2026 Overview)
State-by-state sales tax overview for 2026 — base rates, local quirks, and links to reverse calculators.
What Is Reverse Sales Tax?
Reverse sales tax explained in plain English — when you need it, how it differs from forward tax, and real-world uses.
How Businesses Remove Sales Tax from Receipts
Bookkeeping workflows for separating tax from gross receipts — for expenses, COGS, and resale.
Sales Tax Guide for Online Shopping
How sales tax works on Amazon, Shopify, and marketplace purchases — and how to reverse-calc your order total.
Sales Tax Audit Prep Guide (USA) — Documentation & Reverse Math
How to prepare for a state sales tax audit: substantiation, reverse-calculated receipts, and common examiner requests.
Reverse Sales Tax in QuickBooks — Split Receipts the Right Way
Enter pre-tax amounts and sales tax separately in QuickBooks Online and Desktop using reverse sales tax math.
SaaS Sales Tax in the USA — Nexus, Rates & Reverse Math
When SaaS is taxable by state, how to read tax-inclusive invoices, and how reverse calculation helps finance teams.