any HDHP questions are only relevant if you had an HSA. No HSA. then whether you answered the questions correctly is irrelevant.
however, if you qualified to have an HSA in 2018 by using the last month rule i.e. you didn't have a HDHP every month in 2018 but did on 12/1/18 and used that to qualify for a full year HSA contribution you must maintain a HDHP through Nov 19 in order to avoid having to pick up 11 months as income and pay a 10% penalty
