You would only make an entry to report HSA contributions if you made them outside of payroll. You would have a bank deposit slip, you could look at your account or call your bank to find out how much you deposited.
If you do your HSA contributions through payroll, all you need to do is enter your W-2 in TurboTax. You don't need to determine how much your employer paid in and how much you paid in.
- Your HSA contribution is reported in Box 12 of your W-2 with the code W (Company Contributions to Health Savings Account).
Tip: Code W actually reports the combined contribution – yours plus your employer's. So if you contributed $1,500 to your HSA and your employer matched it dollar for dollar, Box 12 on your W-2 would show $3,000 with a code W.
- How do I fill out the Box 12 information from my W-2?
- Can I deduct medical costs paid with HSA or MSA funds?
- Where do I enter my medical expenses?
- Why is my HSA distribution taxable?
- What is Form 8889?
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Do you not know this? If you made personal contributions, you would make them by sending cash, check or money order to the HSA bank, either online or by mail. You should have bank records. Your HSA bank should also be able to give you a statement of your account, possibly that you can download online.