2015 TurboTax and 2016 TurboTax indeed require the filing of Form 1040 (with Form 8889) if you or your wife made contributions to an HSA for 2015, either through an employer or as a personal deductible contribution. If TurboTax prepared 2015 Form 1040EZ, it means that the HSA contribution was not properly entered. Perhaps a code W amount on your wife's 2015 Form W-2 was overlooked and not entered into 2015 TurboTax. If the contribution was a personal deductible contribution rather than through an employer, Form 1040 is required by the IRS to be able to claim the deduction (2015 Form 1040 line 25).
