Per-state nexus answers your firm can defend.

No. There is nothing to authorize in your client's QuickBooks. You export three standard QuickBooks Online reports (Sales by Product/Service Detail, Transaction List by Customer with shipping and billing addresses, and the Customer Contact List) or fill in our CSV or XLSX template, and upload them.

No. It files nothing, remits nothing, registers nothing and calculates no tax. It tells you where a client has nexus and why, so your firm can advise and act.

A sale generally belongs to the state where the customer receives it, usually the ship-to address; the billing address is only a fallback when no delivery address is known. QuickBooks Online reports can show a customer's default address, or a blank, instead of the ship-to typed on the invoice, so Nexus Auditor records where each sale's address came from and flags results where more than 10% of sales rest on default addresses. Addresses that cannot be placed in a state are listed so you can fix them.

State sales and use tax: economic nexus for every state with a sales tax plus DC, physical nexus in the client's home state and in each state where you record employees, inventory, offices or reps, and the Alaska Remote Seller Sales Tax Commission threshold for the local taxes of its member cities and boroughs. New Mexico's gross receipts tax and Hawaii's general excise tax are treated as those states' sales taxes. States where localities administer their own sales tax, such as Colorado's self-collecting home-rule cities, are marked but not evaluated. Five separate business taxes (Washington B&O, Ohio CAT, Texas franchise, Delaware and Oregon gross receipts) are listed as not evaluated, and income taxes are not covered.

We keep 883 official sources on file and poll 732 of them on a schedule from daily to quarterly; every detected change is flagged for a person to review. Each state's economic nexus rule shows its source and the date it was last checked; all were rechecked in September 2026. Changes are added as new versions with effective dates: sales are counted under the rules in force on their dates, the threshold in force on the measurement date decides, and a threshold met only under an earlier version is marked for review. Rules where sources disagree or are silent carry a lower confidence rating, which lowers the finding's confidence.

The status for the state; each test the state applies (sales, and transactions where it still counts them) against its threshold with the rule's comparator; every measurement window; what counted, including the state's sales basis, marketplace and resale treatment, and exempt or resale claims without a valid certificate; the rule versions applied with their sources; and the reasons behind the confidence level.

No. A finding is decision support for your review: the test, the numbers, the law version and its source. The law data is seeded and monitored by us, not reviewed by counsel. The conclusion you give your client is yours.

Each firm has its own workspace, and firms are isolated from each other in the database. Everyone in a firm, including guests, can see its clients; roles decide who can change data, and only owners and admins can undo an import.

CSV, XLSX or XLS files up to 25 MB and 250,000 rows each. Files are stored when you upload them, but no sales are recorded until you review the check and confirm, and an owner or admin can undo a confirmed import.

The design-partner pilot is $300 flat for 90 days, open to 8 firms at most and credited in full against the first year. Pilot firms then pay $149 a month for the first 12 months and can cancel any month. After that, Practice is $199 per firm per month or $1,990 a year, with unlimited client files and 5 seats. Billing is by invoice or a Stripe payment link.

Fill in the application form on this site (it is run by Formaloo), or write to support@nexusauditor.com. We read every application and reply by email.