My business expenses were on a 2106EZ form for 2015. 2016 is printing on a 2106. why?

Are you doing a 2015 return, or a 2016 one?

You must have entered something that requires Form 2106, and cannot be reported on Form 2106-EZ. You cannot use Form 2106-EZ if you received any reimbursement of expenses from your employer, or if you claim actual vehicle expenses instead of using the standard mileage rate.

You can use Form 2106-EZ instead of Form 2106 to claim your unreimbursed employee business expenses if you meet all the requirements listed above Part I of the form. Otherwise, you must use Form 2106.

https://www.irs.gov/pub/irs-pdf/f2106ez.pdf