What to Do if Your Business Already Has a State Tax Account Before Registering Through Kintsugi

If your business was previously registered for sales tax (or another tax type) in a state before Kintsugi began managing your compliance, that existing account can affect how Kintsugi registers you going forward. This article explains why it matters and what to do about it.

Why this matters

Most states only allow one active tax account per business per tax type. If your business already has an account through a prior provider, a previous filer, or a registration you completed yourself, the state will typically block a new registration attempt once it recognizes your business's FEIN already on file.

When this happens, Kintsugi can't simply create a new account. We need to either import your existing account or resolve the conflict with the state directly.

A few states (like California) do allow duplicate accounts to go through. If that happens, the new registration isn't rejected up front, but it creates a duplicate account that has to be identified and deregistered later, along with any backfilings that were generated in the interim. It's much easier to flag an existing account before registration than to unwind a duplicate afterwards.

Before you register: tell us what you already have

If you know your business is already registered in a state for sales tax or any other tax type, let your onboarding contact or Kintsugi support know before registration is triggered. This is especially important if you're switching from another provider (such as TaxJar or Avalara), since those registrations remain active with the state even after you leave that platform.

Sharing this upfront helps us:

• Import your existing account instead of attempting a new registration

• Avoid duplicate accounts, back filings, and states initiating unwanted "back tax due" reviews for periods that were already filed elsewhere

• Set the correct registration date so your filing calendar lines up with when your account actually began

What we need to import an existing account

To link an existing state tax account to Kintsugi, we'll typically ask for one of the following:

1. Login credentials for the state's online tax portal (username and password), so we can access the account directly.

2. The state-issued account number and PIN/access code, if you'd rather not share your login.

3. A copy of a previously filed return or your registration confirmation letter, which some states accept in place of a PIN to verify the account.

If you don't have your login credentials on hand, you can contact the state's revenue department directly to retrieve your PIN or reset your portal access. We can provide the relevant state contact information if you're not sure where to go.

If you'd rather not share your login credentials

If your existing state account covers a different tax type but not Sales and Use Tax specifically, we can usually add Sales and Use Tax as a new tax type under your existing account/FEIN without requiring your login. Kintsugi handles the account creation and linking on our end. Depending on the state, this may still require a short paper application rather than an online registration, since some states block online registration once a FEIN is on file.

If Sales and Use Tax is already registered under your FEIN, we're not able to create a second account for it. In that case, we'll need one of the import options above (login, PIN, or a filed return) to link the existing account rather than create a new one.

If a duplicate registration has already happened

If Kintsugi has already submitted a new registration and you later realize your business was already registered in that state, don't worry because this is something we can resolve. Contact Kintsugi Support as soon as possible, and we'll:

• Confirm the duplicate with the state

• Initiate deregistration of the duplicate account

• Reconcile any backfilings that were created against the duplicate so they don't remain outstanding on your account

What to do

1. Before registering in a new state, check whether your business already has an account there, including from a previous filer, provider, or a registration you completed yourself.

2. Tell Kintsugi support which states you're already registered in, so we can import rather than re-register.

3. Gather your login credentials, account PIN, or a prior filed return for any state where an existing account applies.

4. Contact Kintsugi support if a state blocks registration due to an existing FEIN, or if you suspect a duplicate registration was created.

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