that can happen if you got dependent care on your w-2 (box 10) and either haven't gotten to that section in Turbotax or spent less than the credit. if you can view the 1040 you would see letters like DCR on that line.
there is also a worksheet in Turbotax called the wages, etc wks that will show how line 1 was arrived at,
other items like allocated tips, return of retirement contributions and others can add to what the w-2 shows on line 1.
or maybe you entered something incorrectly in one version but not the other version
