I want to contribute the $6750 to my HSA as it covers myself and my children. Currently my 2017 form states that I put 2400 into it in 2017. When I try to put 6750-2400 into it, it says that I am funding it in excess (but it will let me max it out as an individual: 3400-2400). How do I make turbo tax realize that this is a family HSA and not an individual one so that I can contribute the maximum amount for 2017?
Revisit the HSA interview and indicate that you were covered by a family plan. This topic comes up a few screens after you enter your HSA contributions. When TurboTax prompts, "Were you covered by a High Deductible Health Plan (HDHP) in 2017?", be sure to select "Yes" and then check "I was covered by a Family plan every month of the year."