PTF... have the same question about credit karma tax. Don't see anywhere to add in (yet) the dividend income and capital gains I've had in my HSA.
I'm not going to get a 1099-DIV or B or any statement from the brokerage so I have to enter it all manually somewhere. Don't know where/how to do it yet (although CK has yet to open up the California section at all, so who knows).