A man and a women are in a car and get in a car crash, and become ghosts... that's all I can remember, except that I watched it on TCM (turner classic movie channel) about 2 1/2 years ago! Help me find this movie please!

Well, it might be Beetljuice, the live one, not the cartoon one. Did the dead couple try to scare away the people who were going to buy and remodel their house, but couldn't see them so they hired Beetljuice for them? They also used him to try and bring them back to life (I think), and the dead couple's niece ( I think that's what she is to them) agrees to marry Beetlejuice if he helps her fix things. Hope this helped a little.

Topper (1937)
Starring Constance Bennett, Cary Grant, Roland Young, Billie Burke
IMDb synopsis:
The fun-loving Kerbys, stockholders in the bank of which henpecked, stuffy Cosmo Topper is president, drive recklessly once too often and become ghosts. In limbo because they've never done either good or bad deeds, they decide to try a good one now: rehabilitating Topper. Lovely, flirtatious Marion takes a keen personal interest in the job. Will Topper survive the wrath of jealous ghost George? Will Mrs. Topper find that a scandalous husband isn't all bad?

Topper (1937) - IMDb

Other films in the series are:
Topper Takes a Trip (1938)
Topper Returns (1941)