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.

What's the economic nexus threshold in South Carolina?

South Carolina 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 South Carolina?

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

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

Confidence: moderate

Parts of this page (often the trailing-nexus timing) are still being verified, so our confidence here is moderate rather than high. Confirm anything you act on with South Carolina Department of Revenue (SCDOR) or a tax professional before you register or deregister.

Can you deregister below threshold?: Yes, after trailing nexus
Trailing-nexus window: Applies — confirm window
Final return required: Yes
How to cancel: the online portal or form C-278
Tax authority: South Carolina Department of Revenue (SCDOR)

Source: South Carolina Department of Revenue (SCDOR)

Short answer

Yes — once your nexus has genuinely ended. Canceling your South Carolina Retail License makes sense if your gross sales into the state have fallen below $100,000 for both the current and prior calendar year and you no longer have physical presence there — you can cancel via Form C-278 or directly through the MyDORWAY portal. The main catch is that South Carolina has not published a specific trailing nexus duration, so you should confirm with the SCDOR that your nexus has truly ended before canceling, and you must file a final sales tax return covering all periods through the close date.

Nexus & savings calculator

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

State

Annual sales into South Carolina

Transactions (orders) per year

South Carolina no longer counts transactions — only sales matter here.

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

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 South Carolina. You can usually deregister after clearing the trailing-nexus window and filing your final return.

Trailing nexus: South Carolina applies trailing nexus — you must keep filing for a window after your nexus ends. Confirm the exact window before canceling.

You could stop paying

$600/ yr

How to cancel in South Carolina →

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

Do you still have nexus in South Carolina?

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 South Carolina creates it. Physical presence in South Carolina — including offices, retail locations, warehouses, stored inventory (e.g. 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 South Carolina

South Carolina has not published an explicit trailing nexus duration policy. The state allows permit cancellation when nexus is lost (per Revenue Procedure #20-2), but has provided no definitive guidance on the specific timing of when a seller can cancel after dropping below the $100,000 threshold. The economic nexus threshold uses a 'previous or current calendar year' measurement, meaning a seller who exceeded the threshold in the previous year retains nexus obligations through at least the current calendar year.

If a remote seller closes their Retail License and later re-establishes nexus, they must pay a new $50 registration fee. State law also requires surrender of a Retail License if no sales have been made for 24 consecutive months.

How to cancel your South Carolina sales tax permit

Confirm both your physical and economic nexus in South Carolina have actually ended.
Work through South Carolina's trailing-nexus window and keep filing (even $0 returns) until it closes.
File any outstanding returns and the final return (C-278), marking it final.
Close the account via the online portal or form C-278.
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 South Carolina 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.

South Carolina Can I cancel FAQ

Can I get in trouble for canceling my South Carolina sales tax permit?: Not if you do it in the right order. The risk comes from canceling before South Carolina's trailing-nexus window ends or skipping a final return. If a remote seller closes their Retail License and later re-establishes nexus, they must pay a new $50 registration fee. State law also requires surrender of a Retail License if no sales have been made for 24 consecutive months.
Do I have to keep filing in South Carolina after I stop selling there?: Usually yes, for a while. South Carolina has not published an explicit trailing nexus duration policy. The state allows permit cancellation when nexus is lost (per Revenue Procedure #20-2), but has provided no definitive guidance on the specific timing of when a seller can cancel after dropping below the $100,000 threshold.
What's the economic nexus threshold in South Carolina?: South Carolina 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 South Carolina

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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.