Taxes and Credits Summary: TurboTax Summary Not Matching Amount on My W-2

I'm filing out my state taxes. After going through the process, I ended up on this page (see image). However, the $1503 here does not match the amount I have in Box 17 on my W-2; which is $1660.82. Does this mean I either entered something incorrectly somewhere on the form, or omitted something I should have included?

 

I do contribute to a 401(k) and have codes AA and DD in Box 12, but I did not manually enter any of that information anywhere on TurboTax. From the way I read each page, it was my understanding I didn't have to.
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