To open an HSA, you must be enrolled in an HDHP and you can’t be covered by Medicare or other health insurance policy, with a few exceptions. You also can’t be eligible to be claimed as a dependent on another return, regardless of whether somebody else actually claims you.
Your HSA contribution is reported in box 12 of your W-2 with the code W (Company Contributions to Health Savings Account). TurboTax automatically records this amount in the 1099-SA, HSA, MSA section.
Code W reports the combined HSA contributions from you and your employer. Don't enter that amount again on your tax return.
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