1040 line 16 - Adding the three tax withholdings from my w2 & (2) 1099's of $1753, 1180, & 1080 my total is $4013, the TurboTax form has $3951, why?

Perhaps you entered $1,008 instead of $1,080.  Or perhaps less likely, maybe you entered $1,118 instead of $1,180.

yes numbers were transposed, thx

I'm embarrassed to say that I had a similar problem.  The mistake was mine.  I had made a mistake in entering the withholding on one of my 1099-Rs.  Go to the forms display and look at the amounts that they show for withholding for your W2s and your 1099s and check them against your paper forms.  If you find a discrepancy you can edit the form to make a correction. 

Thx, wasn't aware the form could be edited.