Sales tax registration
Sales tax registration checklist
Registering for sales tax is the easy part. The harder part is deciding where the business should register, which sales are taxable and who is responsible for the marketplace sales. This checklist covers the review and the records to collect before the first registration and the first return.
Who sends itSent by the firm to a business client that sells goods or taxable services in more than one state, or that is preparing to register in a new state.
0 of 22 ticked
01Nexus review
02Registrations
03Filing setup
04Records and exemptions
05First filing and review
What firms get wrong
- Registering in every state where a marketplace sale shipped, without checking who collects the tax.
- Using one state's product taxability rules for every state.
- Missing a local registration because the state permit was filed.
- Registering but never setting up the filing calendar, which creates a late return.
- Keeping exemption certificates without the invoice that shows what was sold.
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Questions about this checklist
When does a business need to register for sales tax?
A business generally registers when it has physical presence in a state or when its sales cross the state's economic nexus threshold. The timing depends on the state, so check the state's current guidance before the first sale.
Does a marketplace collect the tax for the seller?
Many marketplaces collect and remit the tax on sales they facilitate, but the rules differ by state and by marketplace. Keep the marketplace reports and check which party is responsible for each sale.
What records should a business keep for sales tax?
Keep the sales reports by state, the exemption certificates, the filed returns, the payment confirmations and the rate change notices. These records support the tax collected and the exemptions claimed.
What if the business sold before registering?
Review the exposure with the client and the firm's tax advisor before filing. The options depend on the state and the facts, and the firm should not promise a particular outcome.
How often does the registration need to be reviewed?
Review it every year and whenever the business enters a new state, adds a marketplace or crosses a threshold. A registration that is never reviewed can become a filing you did not expect.
Sources
Checked November 3, 2026. Tax rules, forms and thresholds change; confirm them with the IRS or your tax software before relying on them.
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