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 Connecticut after I stop selling there?

Connecticut 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 Connecticut?

Connecticut uses $100,000 in sales and 200 transactions (12-month period ending September 30). 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 Connecticut?

If you registered for a sales tax permit in Connecticut 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 Connecticut — and how to do it without tripping a penalty.

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

Verify before you act

Sources currently disagree on some details for this state — especially the trailing-nexus window and how to deregister — so we've flagged it for manual review. Treat this page as a starting point and confirm with Connecticut Department of Revenue Services (DRS) or a tax professional before you register or deregister.

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 OS-114
Tax authority: Connecticut Department of Revenue Services (DRS)

Source: Connecticut Department of Revenue Services (DRS)

Short answer

Yes — once your nexus has genuinely ended. Canceling your Connecticut sales tax permit makes sense if you have dropped below both the $100,000 gross receipts AND 200-transaction thresholds for the 12-month period ending September 30 and no longer have physical presence in the state. The process is done online through myconneCT (More menu > Taxpayer's Updates > Close Accounts) and requires you to file all outstanding Form OS-114 returns through your closure date and then destroy your permit.

Nexus & savings calculator

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

State

Annual sales into Connecticut

Transactions (orders) per year

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

Filing frequency

Cost per return

Physical presence
Sales over $100,000
Over 200 transactions

Likely eligible to cancel

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

Trailing nexus: Connecticut 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 Connecticut →

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

Do you still have nexus in Connecticut?

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 and 200 transactions).

For Amazon FBA and 3PL sellers the sneaky one is physical nexus: storing inventory in Connecticut creates it. Storing inventory in Connecticut (including Amazon FBA fulfillment centers) creates physical nexus regardless of sales volume. 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 Connecticut

Connecticut has no specified trailing nexus policy. There is no published DRS guidance on how long a business must maintain obligations after dropping below the economic nexus threshold. Connecticut measures thresholds on the 12-month period ending September 30; if a seller no longer meets both thresholds on September 30, there is no statutory obligation to continue collecting, but DRS has not issued a formal trailing nexus rule.

No explicit statutory restriction on deregistration after falling below threshold, but the absence of a formal trailing nexus policy creates uncertainty. Sellers should confirm with DRS or a tax advisor before canceling.

How to cancel your Connecticut sales tax permit

Confirm both your physical and economic nexus in Connecticut have actually ended.
Work through Connecticut's trailing-nexus window and keep filing (even $0 returns) until it closes.
File any outstanding returns and the final return (OS-114), marking it final.
Close the account via the online portal or form OS-114.
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 Connecticut 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.

Connecticut Can I cancel FAQ

Can I get in trouble for canceling my Connecticut sales tax permit?: Not if you do it in the right order. The risk comes from canceling before Connecticut's trailing-nexus window ends or skipping a final return. No explicit statutory restriction on deregistration after falling below threshold, but the absence of a formal trailing nexus policy creates uncertainty. Sellers should confirm with DRS or a tax advisor before canceling.
Do I have to keep filing in Connecticut after I stop selling there?: Connecticut 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 Connecticut?: Connecticut uses $100,000 in sales and 200 transactions (12-month period ending September 30). 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 Connecticut

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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.