ACA 2017 and 2018?

I am doing my son's taxes in Turbo Tax Deluxe for 2018.  After inputting the 1095-A information (he had all months of 2018 health insurance except January 2018) the question was asked if he had health insurance for Nov./Dec of 2017.   He did not have for Nov/Dec 2017 and then got penalized more on the 2018 taxes.  Wasn't he already penalized when filing 2017 for not having the full year of health insurance?