The line 10 check box has nothing to do if you have made contribution or not. A 401(k) in box 12 on a W-2 is NOT an IRA and does not get entered anywhere else.
That box will be checked if:
TurboTax makes that determination if any of the following are true:
1) Box 13 (retirement plan) on your (or spouses) W-2 is checked,
2) Box 12 on your (or spouses) W-2 contains codes D, E, F, S, or AA/
3) You answered “yes” to the “Are you covered by a Retirement Plan at work” in the interview.
4) You have a self-employed retirement plan.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
