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posted Jan 18, 2026 1:10:33 AM

Box 12 Code W

On my W-2 I have an amount listed under Box 12 Code W. When I enter that amount in Turbo Tax. It increases my federal tax burden by about 30% of the amount and my state tax (Oregon) burden by about 10%. 

 

Why would entering any amount here increase my tax burden? 

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1 Best answer
Level 15
Jan 18, 2026 6:35:00 AM

TurboTax treats the code-W amount as an excess HSA contribution subject to tax and penalty until you complete the HSA section of TurboTax to indicate your eligibility for an HSA contribution.

1 Replies
Level 15
Jan 18, 2026 6:35:00 AM

TurboTax treats the code-W amount as an excess HSA contribution subject to tax and penalty until you complete the HSA section of TurboTax to indicate your eligibility for an HSA contribution.