I'm thinking that the JTWROS deed was used to avoid probate when the mother dies. The deed was created by the attorney who probated the grandfather's estate in 2017. I think that the son needs to go back to the attorney and ask if a life estate was the intent and if so how does the son prove that if he were to get audited by the IRS for failure to pay the capital gains tax sometime in the future after mom died and he sells the house.
