#nexus
Sales tax nexus rules, economic and physical nexus thresholds, and multi-state compliance requirements
A 2026 field guide to the Streamlined Sales Tax Project — the 24 member states, how the free SSTRS portal works, who qualifies as a CSP-compensated seller for free Avalara, TaxCloud, Sovos, or AccurateTax service, and when SST is the wrong choice for multistate online and SaaS sellers.
Eight states tax remote workers as if they sat in the office. A 2026 guide to the convenience of the employer rule, the May 2025 Zelinsky decision, reciprocity agreements, resident credits, and what multi-state employers must withhold.
Sales tax you collect belongs to the state, not your revenue line. Here are the journal entries, the month-end reconciliation routine, and the multi-state economic nexus rules that keep your books audit-ready.
Public Law 86-272 once shielded out-of-state sellers from state income tax, but the MTC's 2021 revised statement now treats chat widgets, post-sale support, and analytics cookies as immunity-breaking activities — and California, New York, New Jersey, Oregon, and Minnesota have signed on.
A 2026 guide to U.S. sales tax economic nexus — how the $100,000 threshold works after Wayfair, which states still count transactions, how marketplace facilitator laws affect your nexus math, and what to do when you should have registered months ago.
Washington's B&O tax is a gross receipts tax with major 2026 changes — a $2 million economic nexus threshold, tiered service rates from 1.5% to 2.1%, and a $2M standard deduction. This guide breaks down activity-based classifications, market-based sourcing, penalty math that can exceed 39%, and the bookkeeping practices that keep multistate sellers audit-ready.
By 2026, sales tax on SaaS and digital goods splits into three legal routes—tangible property, taxable service, or nontaxable intangible—plus a true-object test that turns on customer intent. This guide covers the 2026 Illinois, Maine, and D.C. changes, economic nexus thresholds, and when a voluntary disclosure agreement beats direct registration.
How U.S. states divide multistate corporate income using single sales factor, three-factor, and market-based sourcing rules — including throwback and throwout traps, P.L. 86-272 limits, and the bookkeeping detail required to file accurately.
A guide to state corporate income tax apportionment in 2026 — why 34 of 44 corporate-tax states now use single sales factor, how market-based sourcing rules in California, Kansas, and Arkansas shift SaaS and service company tax bills toward customer location, and five strategies to manage the exposure.
Drop shipping treats one shipment as two sales for tax purposes, and depending on nexus, resale certificate rules, and marketplace facilitator laws, an ecommerce operator can owe tax in states they never set foot in. A 2026 field guide to who actually collects, the ten strict resale states, and the nexus thresholds — including transaction-trigger drops — that decide your exposure.
Marketplaces like Amazon, Etsy, and Shopify collect sales tax for you, but registration, zero returns, and economic nexus tracking are still your responsibility. A 2026 compliance routine for multi-channel sellers, with state thresholds and the six mistakes that trigger penalties.
How state income tax really works for remote employees who cross state lines: the convenience-of-the-employer rule used by seven states (including New York), which reciprocity agreements eliminate double taxation, day-counting evidence auditors accept, and the bookkeeping habits that keep multi-state returns predictable.
