Since Wayfair, 45 states plus DC impose sales-tax obligations once your sales cross an economic threshold — commonly $100,000 or 200 transactions in a state. Shopify and Amazon collect, but they don't register or file for you, and marketplace-facilitator rules don't cover your direct sales. Next Tax Source runs a full nexus study, registers you only where you genuinely owe, configures your tax engine, and files returns across every state — reviewed and signed by a licensed professional.
When do I have to start collecting sales tax in a state?
When you cross that state's economic-nexus threshold — usually $100,000 in sales or 200 transactions over twelve months, though it varies. We monitor your numbers against every state's rule and tell you the month you tip over.
Doesn't Amazon handle sales tax for me?
Only for sales through the Amazon marketplace, under marketplace-facilitator laws. Your Shopify, WooCommerce or direct sales are your responsibility, and you may still need to register and file even where Amazon collects.
I think I already owe back sales tax — what now?
Many states offer Voluntary Disclosure Agreements that limit the look-back period and waive penalties if you come forward before they find you. We negotiate these routinely — it's almost always cheaper than waiting.
Can you file in all the states I sell into?
Yes. We register and file across all 45 sales-tax states plus DC, on each state's own schedule, with every return reviewed before submission.
Every Filing, Signed By A Professional
We prepare it all to a ready-to-sign standard; a CPA or EA reviews and signs before anything is filed. Tell us your situation and we'll return a scoped proposal within one business day.
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