I made additional contribution to my HSA not through work. Where do I add this ?

[melgarejo-jose]

"Yes, post-tax (after-tax) HSA contributions are fully tax-deductible. If you contribute to an HSA outside of payroll deductions, you can claim this as an "above-the-line" deduction on your federal income tax return (Form 1040, Schedule 1), reducing your taxable income even if you do not itemize. These contributions are subject to annual IRS limits."

[MindyB · Accepted solution]

You are correct, you can deduct this.  Be aware that payroll tax still applies when you make a personal contribution.  If you contributed via your paycheck, then it would be payroll tax free also. Just a note, in case you'd like to update your paycheck contributions in the future.

Here is how to navigate to make the entry:

1. Click on Federal Taxes,  Deduction & Credits
2. Choose HSA, MSA Contributions
3. Continue until you see a page titled "Let's enter (your name's) HSA contributions" which will show any deductions already computed from your W-2 in a box that is greyed out, and another box for contributions you personally made.  
4. Enter the amount you personally made.

For some more information, see Basics of Health Savings Accounts