Ship From Addresses and US Tax Origin

How Kintsugi picks the seller address that sets the local rate on your in-state US sales, and where a Ship From address fits in.

Updated 8 days ago

Most US sales are taxed at the rate where the order lands. A small number of states do the opposite for sales that stay inside one state: they tax at the rate where the seller is located. In those states, the address Kintsugi treats as your origin decides which city, county, and district rates apply, so the address it picks can change what your customer pays.

Quick Summary

Origin sourcing applies only to a sale that stays inside one state where you have a physical presence
An office in that state always wins, so a Ship From address is used only when you have no office there
A Ship From address is used only when it sits in the same state as your customer and you have some other physical presence in that state
A blank, incomplete, or unverifiable Ship From address is skipped, and tax still calculates
Ship From shows on transaction details whenever it exists, even when it was not the address used for tax

What a Ship From Address Is

A transaction can carry three addresses.

Address	Whose address it is	What it represents
Ship To	Your customer	Where the goods are delivered, the destination
Bill To	Your customer	Where the invoice is billed
Ship From	Yours	The location the goods left, your tax origin

Ship From is the only one of the three that describes you rather than your customer. Kintsugi never turns a customer address into a Ship From address, and it never uses Ship From as the delivery address.

When Origin Sourcing Applies

All three of the following have to be true. If any one of them is false, the sale is taxed at your customer's delivery address and none of the rules further down run.

Condition	What it means
The sale stays inside one state	Ship From and Ship To are in the same state
You have a physical presence in that state	An office, a store, a warehouse, inventory, or people working there
That state sources in-state sales to the seller	Most states do not, Utah now does

A remote seller is always taxed at the customer's address. If your only reason for collecting in a state is economic nexus, and you have nothing physical there, origin sourcing does not apply to you in that state.

This matters most for drop shipping. When a third-party warehouse inside your customer's state ships the order, the sale looks like an in-state sale with an in-state Ship From address. That warehouse belongs to your supplier, not to you, so Kintsugi does not treat it as your origin.

How Kintsugi Picks the Origin Address

Kintsugi works down this list for every US sale and stops at the first address that qualifies.

Path	Address	What has to be true
1	A presence record categorized as Physical Business Location	The record is in the same state as your customer
2	The Ship From address on the transaction	There is no Physical Business Location in that state, Ship From is in your customer's state, and you have another physical presence record there
3	The company address in Business Details	That address is in your customer's state
4	Your customer's Ship To address	Nothing above qualified, so the sale is treated as destination based

Two details are easy to miss.

Only a Physical Business Location outranks Ship From. Every other presence category, including Warehouse & Inventory, a remote employee, and an in-state sales person, shows that you are not a remote seller, but it does not take priority over the Ship From address on the transaction.

The company address in Business Details does not on its own make a Ship From address eligible. Step 2 still needs a separate physical presence record in that state.

A Worked Example

You sell into Arizona. You have no office there, you do have a Warehouse & Inventory presence record in Arizona, and an order ships from your Tucson warehouse to a customer in Phoenix.

Path 1 does not apply, because you have no Physical Business Location in Arizona. Path 2 does apply: the Tucson Ship From address sits in your customer's state, and the warehouse record gives you a physical presence there. Kintsugi uses the Tucson address, so the county and city portions of the rate come from Pima County and Tucson rather than from Maricopa County and Phoenix.

Now remove that Arizona warehouse record. Path 2 stops applying and the sale falls through to Path 3. If your company address in Business Details is in Arizona, that address sets the rate. If it is not, the sale is taxed at your customer's Phoenix address instead.

States That Split the Rate

Two states do not take the whole rate from a single address.

State	Origin address sets	Customer's address sets
California	The state, county, and city portion	The district portion
Texas	The origin local rate	A destination top-up when the customer's local rate is higher, capped at 2 percent

In both states, keep your customer's address complete even on an origin-sourced sale, because part of the rate depends on it.

What Kintsugi Handles vs. What You Handle

Kintsugi handles:

Selecting one origin address per transaction, using the order above
Applying the same selection to saved transactions and to tax estimates, so the two agree
Skipping a Ship From address it cannot use, without stopping tax calculation
Leaving an invalid Ship From address off the Incomplete Addresses page when fixing it would not change any tax

You handle:

Keeping your presence records current, including the category and the start and end dates
Keeping the company address in Business Details accurate
Correcting a Ship From address on a transaction when it does not match where the goods shipped from
Providing Ship From data from the platform you sell on, where that platform supports it

Seeing and Correcting Ship From

Open any transaction. When that transaction carries a Ship From address, it appears as its own card alongside Bill To and Ship To, with its own validation status. Select Edit on the card to change it, the same way you would for the other two. The card appears whenever the address exists, whether or not it was the address used for tax.

The Incomplete Addresses page treats Ship From differently from the other two addresses. That page lists your flagged transactions when you select Bulk Cleanup next to Invalid Address Transactions in Pending Tasks. An invalid Ship From address appears on it only when correcting that address would change the tax on the transaction. If the address would not be selected as your origin, Kintsugi keeps it off the page rather than asking you to fix something with no tax effect. A Ship From address on its own also never marks a transaction's overall address status as invalid.

For the steps to review and correct a flagged address, see How to Update Invalid Addresses in the Kintsugi App.

When the origin Kintsugi picked is not the one you expected, check three things in this path: (1) whether a Physical Business Location record exists in that state, (2) whether your other presence records in that state are current, and (3) whether the Ship From address on the transaction is complete and in the same state as your customer.

What This Article Does Not Cover

One transaction gets one origin address, so splitting a transaction across several fulfillment locations or setting a Ship From address per line is not supported
Kintsugi does not send an origin address for sales outside the United States
The full list of states that use origin or mixed sourcing, which lives in Explaining US Sales Tax Jurisdictions
How the destination address is chosen when Ship To is missing or invalid, which lives in How Kintsugi Optimizes Invalid & Blank Addresses
Where you need to register, which depends on your physical presence but is separate from how a single transaction is sourced

This article is general information about how Kintsugi works, not tax advice for your specific situation.

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