First of all, you are using the 2016 tax program installed on your computer to do your 2016 return, right?
The reason I ask, is that TurboTax does not autofill boxes 16 and 17, unless you import your W-2 information. That is not an option on a 2016 tax return, it is only for the current year.
Boxes 16 and 17 are for your state income and state income tax withheld. Not having any numbers in boxes 16 and 17, could affect (decrease), both your state and federal refund as the state tax withheld increases your state refund and your itemized deductions.
That being said, you have to go with the copy you were given by your employer, because that is what was filed with the IRS.
If you have multiple copies, Copy B, Copy C, etc., be sure to check each of them. Occasionally an employer will only include the state tax information on one or two of the copies and leave the others blank.
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