the HDHP question is usually in relation to a Health Savings Account contribution. you say he wasn't covered by a HDHP at any time during 2021, therefore he's not eligible for an HSA contribution. this is really a programming bug in Turbotax since "none" is not an option. select "self". hopefully, he doesn't have a code W with an amount on his W-2 (if he has one). if he does, post back because there are tax issues.
