Edit - Found the Source - thank you Credit for Retirement Contributions

[Jenni B]

Turbo Tax is calculating a credit for a retirement contribution that I didn't make - what is the source of the information it is using to calculate? 

[VolvoGirl]

Did you contribute to a 401K plan at work?  Check your W2.

[Jenni B]

Just found it - was on an imported W-2.  Thank you!