Are you able to edit your HSA information by following these steps?
- Down the left side of the screen, click Federal.
- Across the top of the screen, click Deductions & credits.
- Scroll down to Medical. Click Show More to the right.
- To the right of HSA, MSA contributions, click Start / Revisit.
- At the screen Your HSA summary, click Edit.
Your HSA contribution is reported in Box 12 of your W-2 with the code W (Company Contributions to Health Savings Account). 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.
See also this TurboTax Help.