You'll need to make sure you go through the HSA screens to indicate what kind of coverage you had in 2024 so that TurboTax knows you were eligible. This is in the Deductions and Credits section of TurboTax.
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You'll also need to enter the after tax contributions you made to the account. This is done on the screen that says Let's enter your HSA contributions. The contributions from your W-2 will flow to this screen, and there's a box where you can enter additional contributions you made.
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