What is trailing nexus?

Most states make you keep filing for a while after you drop below their threshold. California runs through the next full calendar year. Texas uses a rolling twelve months. We track each state's rule so you cancel on the right date, not too early.

Will I get in trouble for canceling a permit?

Not if you do it in the right order. We file every outstanding and final return first, then guide the cancellation. The real risk is canceling early or skipping a final return, which is exactly what we prevent.

Which platforms do you support?

Amazon, Shopify and WooCommerce, with BigCommerce, Etsy, Walmart and eBay supported through manual entry. You can also enter your states by hand on any platform.

Do you file my returns?

Yes. During the wind-down we file the zero-dollar returns so nothing lapses, and once you're deregistered in a state there's nothing left to file.

How is this different from Avalara or TaxJar?

They help you register and file more. We help you deregister and file less. We only charge for the states you keep.

No. TrailingZero is software that flags deregistration opportunities and handles filings. For complex situations we tell you when to bring in your accountant.

Is TrailingZero live?

Yes. Free audits are live now — run yours in minutes. Connect a store read-only or enter your registered states by hand to see which you can cancel and what it saves.

Do I have to keep filing in Colorado after I stop selling there?

Colorado has little or no trailing-nexus window, so once your nexus ends and final returns are filed you can generally stop.

What's the economic nexus threshold in Colorado?

Colorado uses $100,000 in sales (previous or current calendar year). Under it, with no physical presence, you generally don't have economic nexus.

No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

Deregistration guide

Can I cancel my sales tax registration in Colorado?

If you registered for a sales tax permit in Colorado to be safe and most of your returns now read $0, you may be paying to file in a state you no longer owe. Here's when you can cancel in Colorado — and how to do it without tripping a penalty.

By John DoeReviewed by Jane Doe, CPAUpdated June 2026How we verify

Can you deregister below threshold?: Yes, after trailing nexus
Trailing-nexus window: Minimal / none
Final return required: Yes
How to cancel: the online portal or form DR 1108
Tax authority: Colorado Department of Revenue — Taxation Division

Source: Colorado Department of Revenue — Taxation Division

Short answer

Yes — once your nexus has genuinely ended. Canceling your Colorado sales tax registration makes sense once you are confident your gross retail sales into Colorado fell below $100,000 in the prior full calendar year and are tracking below $100,000 in the current year — at that point you no longer meet the economic nexus threshold and ongoing registration (plus mandatory zero-return filings) creates unnecessary compliance burden. The key catch is Colorado's calendar-year measurement: if you exceeded the threshold last year, you remain obligated through this full calendar year even if sales have since dropped, so canceling too early can leave you liable.

Nexus & savings calculator

Estimate whether you still have nexus in Colorado — and what canceling could save.

State

Annual sales into Colorado

Transactions (orders) per year

Colorado no longer counts transactions — only sales matter here.

I have physical presence hereFBA/3PL inventory, an employee, or an office in Colorado

Filing frequency

Cost per return

Physical presence
Sales over $100,000
Transactions (not counted here)

Likely eligible to cancel

Based on these numbers you likely no longer have nexus in Colorado. You can usually deregister after clearing the trailing-nexus window and filing your final return.

Trailing nexus: Colorado has limited or no trailing-nexus window — you can generally deregister once your nexus has ended and final returns are filed.

You could stop paying

$600/ yr

How to cancel in Colorado →

Estimate only — general education, not tax advice. Confirm with Colorado's tax authority before you register or deregister.

Do you still have nexus in Colorado?

You can only cancel once your obligation has ended. Two things create it: physical presence (inventory, an employee, an office) and economic nexus (crossing $100,000 in sales).

For Amazon FBA and 3PL sellers the sneaky one is physical nexus: storing inventory in Colorado creates it. Any physical presence in Colorado creates nexus immediately, including offices, employees, warehouses, or stored inventory (e.g., Amazon FBA fulfillment centers). If that inventory has since left the state, your physical nexus may have already ended even though the registration is still open.

Trailing nexus in Colorado

Colorado does not have an explicitly codified trailing nexus rule. The economic nexus threshold is measured on a calendar-year basis: if a seller did not exceed $100,000 in the previous calendar year AND has not yet exceeded $100,000 in the current calendar year, nexus generally ceases and the seller may be eligible to close their account. There is no defined statutory period of continued obligation after dropping below the threshold.

Because Colorado uses a previous-or-current calendar year measurement, a seller who exceeded the threshold in Year 1 must continue collecting through the end of Year 2 even if Year 2 sales are low. In practice, deregistration is appropriate only when the seller is confident that both the prior full calendar year AND the current year-to-date are below $100,000. The seller must file a final return before submitting the account closure.

How to cancel your Colorado sales tax permit

Confirm both your physical and economic nexus in Colorado have actually ended.
Work through Colorado's trailing-nexus window and keep filing (even $0 returns) until it closes.
File any outstanding returns and the final return (DR 1108), marking it final.
Close the account via the online portal or form DR 1108.
Keep your records; states can review a closed account for several years.

Where TrailingZero fits

TrailingZero connects to your store read-only, maps where you actually have nexus state by state, and computes the exact date you can deregister in Colorado after trailing nexus. During any wind-down it can file the zero-dollar returns so nothing lapses — and you only pay for the states you genuinely keep. Run a free audit anytime; this page is free education either way.

Colorado Can I cancel FAQ

Can I get in trouble for canceling my Colorado sales tax permit?: Not if you do it in the right order. The risk comes from canceling before Colorado's trailing-nexus window ends or skipping a final return. Because Colorado uses a previous-or-current calendar year measurement, a seller who exceeded the threshold in Year 1 must continue collecting through the end of Year 2 even if Year 2 sales are low. In practice, deregistration is appropriate only when the seller is confident that both the prior full calendar year AND the current year-to-date are below $100,000. The seller must file a final return before submitting the account closure.
Do I have to keep filing in Colorado after I stop selling there?: Colorado has little or no trailing-nexus window, so once your nexus ends and final returns are filed you can generally stop.
What's the economic nexus threshold in Colorado?: Colorado uses $100,000 in sales (previous or current calendar year). Under it, with no physical presence, you generally don't have economic nexus.
Is this tax advice?: No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

See what you can stop paying in Colorado

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Other states

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Sources

Primary sources reviewed for this page. Data current as of June 2026.

TrailingZerois software, not a CPA or law firm, and this page is general education — not tax or legal advice. State rules and thresholds change frequently; confirm your situation with the state's tax authority or your accountant before you register or deregister. See how we research and review this data in our editorial & accuracy policy.