Does Amazon's 1099-K data alert states that I may owe sales tax?

Yes. Amazon files 1099-K forms with the IRS for sellers above the reporting threshold, and the IRS shares that data with state revenue agencies. States then use it to identify sellers with apparent in-state sales who aren’t registered with the state: a systematic audit trigger that catches unregistered sellers without any manual investigation.

How the data pipeline works

Amazon files a 1099-K with the IRS for each qualifying seller. The form reports the seller’s gross transaction amount for the year: the total of all payments processed through Amazon, not net of refunds or fees.

The IRS shares state-sourced data with state revenue agencies under data-sharing programs. The extent of sharing varies by state, but most states with income taxes have some mechanism to receive relevant IRS data, including 1099-K information.

Many states have direct marketplace reporting requirements. Beyond relying on IRS data sharing, a number of states require marketplaces to directly report seller sales data to the state’s Department of Revenue. Amazon complies with these requirements.

States run matching programs. State revenue agencies compare the sales data they receive against their own seller registries. A seller showing $400K in apparent annual sales into a state who has no registration record in that state generates a flag, and typically a nexus questionnaire or audit notice.

The threshold change that increased exposure

Before 2022, the 1099-K reporting threshold was $20,000 in gross payments and 200 transactions. In practice, this meant many smaller sellers were below the threshold and didn’t appear in the data.

The IRS lowered the threshold to $600 in gross payments (after several implementation delays, taking effect for the 2024 tax year). At $600, essentially every active Amazon seller receives a 1099-K, regardless of sales volume. The data set state agencies receive is now vastly larger, meaning smaller sellers are now visible in ways they previously weren’t.

What the data does and doesn’t show

The 1099-K shows gross payment amount: total sales processed through Amazon. It doesn’t break down by state, by transaction, or by product type. It’s a single annual number.

States receive this number and compare it against their records. They don’t automatically know which of your Amazon sales went to customers in their state, but they can see whether you’ve been registered with them. A seller with $1M in Amazon revenue who isn’t registered in any state is visible.

For states with direct marketplace reporting (not just IRS data sharing), the data may be more granular, showing in-state sales specifically rather than total gross sales.

The separate question of FBA and other-channel obligations

Amazon collecting sales tax on your Amazon transactions doesn’t remove you from 1099-K reporting. The 1099-K reflects gross sales regardless of who collected the tax. States may still send a nexus questionnaire to:

• Verify whether you have a registration obligation due to physical nexus (FBA)
• Determine whether you have other-channel sales in the state that Amazon isn’t covering
• Confirm your account status

Receiving such a questionnaire is the point at which the VDA window closes and audit-response mode begins. If you haven’t registered in states where you have nexus, the time to address it is before a questionnaire arrives, not after.

Related: What triggers a sales tax audit for an online store? | I haven’t been collecting sales tax — what do I do now?