Box 6 of Form 1099-NEC contains two pieces of information on one line: the two-letter abbreviation of the state that received any withheld tax, and the payer’s state tax identification number under which that money was remitted. It is not a dollar amount. The withheld dollar figure sits in Box 5, and Box 6 exists to tell you and the state tax agency which jurisdiction and which payer account those dollars belong to.
What Box 6 Contains and How It Relates to Boxes 5 and 7
Box 6 never works alone. It is part of a three-box block that describes state-level activity on the form:1Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025)
- Box 5 shows the dollar amount of state income tax withheld from your payments during the year.
- Box 6 shows the state abbreviation and the payer’s state tax ID number tied to that withholding.
- Box 7 shows the total state payment amount, which is the income figure the state will match against your return.
The IRS treats all three of these boxes as optional at the federal level. The official instructions describe them as “provided for your convenience only and need not be completed for the IRS.”1Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) State agencies are a different matter, and payers enrolled in the IRS Combined Federal/State Filing program have the state fields transmitted to participating states automatically along with the federal filing.2Internal Revenue Service. Combined Federal/State Filing (CF/SF) Program
The form has room for up to two states, separated by a dashed line. If a contractor worked in three or more states for the same payer, the payer issues additional 1099-NEC forms to cover the extra jurisdictions.
When Box 6 Gets Filled In
Most independent contractors who supplied a valid taxpayer identification number on their W-9 and worked only in their home state will see Boxes 5, 6, and 7 blank. Payers generally do not withhold state income tax from contractor payments, and when nothing is withheld there is nothing to label. Three situations commonly cause the state boxes to be completed.
You Worked in a State Where You Don’t Live
This is the most frequent trigger. Many states require the payer to withhold state income tax on payments to nonresidents who earn income within the state’s borders. Thresholds vary widely between states. Some require withholding after a single day of work regardless of the dollar amount, while others set a floor that can run from a few hundred dollars up to roughly $15,000. Withholding rates across states that impose them generally fall between about 1% and 7% of the payment.
Once the payer withholds, it remits the funds to the state tax agency on that state’s schedule. The cumulative annual withholding lands in Box 5, the state and payer state ID land in Box 6, and the associated income lands in Box 7.
You Didn’t Provide a Valid Taxpayer ID
When a contractor fails to give a valid TIN on their W-9, federal backup withholding kicks in at a flat 24% rate on every payment.3Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide4Internal Revenue Service. Backup Withholding That federal amount goes in Box 4, not the state block. But many states impose a parallel state withholding obligation when no valid TIN is on file, and when they do, the state amounts flow into Boxes 5, 6, and 7.
You Arranged Voluntary State Withholding
Less commonly, a contractor and payer agree to voluntary state withholding, treating it as a running estimated tax payment. The mechanics are the same. Boxes 5 through 7 get filled in, and the contractor claims the credit on their state return.
How to Use Box 6 When You File Your State Return
Box 6 tells you two things at a glance: which state expects a tax return reflecting the income on the form, and how to verify that any withholding was deposited with the right agency.
The dollar figure you actually claim as a credit is in Box 5, not Box 6. You report that amount on the line your state’s return designates for state withholding or estimated tax payments, and it reduces your state tax bill dollar for dollar. If Box 5 exceeds your total state tax liability for the year, the state refunds the difference.
The state abbreviation in Box 6 matters most when you worked in more than one state. In general, you need to file a nonresident or part-year return in every state listed in Box 6 across your 1099-NECs, using the Box 7 figure to report the income earned in each. If you live in one state but had tax withheld by another, your home state’s return will usually let you claim a credit for taxes paid to that other state, which keeps the same income from being taxed twice.
Box 7 gives you a cross-check. Compare it against your own records of what you earned from that payer in that state. If the numbers don’t line up, the payer may have allocated income to the wrong jurisdiction, which affects where you file and could leave you paying tax to a state where you didn’t actually earn the income.
What to Do If Box 6 Is Wrong
A contractor can’t correct a 1099-NEC directly. The payer files the correction, and the procedure depends on what’s wrong.
Wrong State Abbreviation or Payer State ID
If Box 6 names the wrong state or shows the wrong payer state ID number, the IRS treats the fix as a “Type 2” correction, which takes two steps. First, the payer files a return with the “CORRECTED” box checked and zeros in every dollar field to cancel the original. Then the payer files a second, uncorrected return with all the right information.5Internal Revenue Service. 2025 General Instructions for Certain Information Returns The two-step approach keeps the state from matching your return against a form that points to the wrong jurisdiction.
Wrong Amount in Box 5, Right State in Box 6
If the state and ID number in Box 6 are correct but the withholding figure in Box 5 is not, the payer files a single corrected return with the “CORRECTED” box checked and the right amount in Box 5. Every other field stays the same as the original, and the payer transmits it with a new Form 1096.5Internal Revenue Service. 2025 General Instructions for Certain Information Returns If the original was filed electronically, so is the correction.
Contact the payer as soon as you spot a discrepancy. Claiming a withholding amount on your state return that doesn’t match what the payer reported to the state can trigger an assessment and penalties later.
Box 4 Is Not Box 6
A common source of confusion is worth naming directly. Box 4 reports federal income tax withheld under backup withholding rules, currently at 24%.4Internal Revenue Service. Backup Withholding3Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide Box 5 reports state income tax withheld. Box 6 labels which state Box 5 belongs to. Box 4 and Box 5 do parallel jobs at different levels of government, and Box 6 is a tag on the state side. Keeping the three boxes distinct prevents most of the errors contractors make when moving 1099-NEC figures onto their federal and state returns.