#1 You must already have placed your investment funds with an IRA Custodian in a “Self-Directed” IRA account.
#2 When you put the investment property under contract, you must write the contract as : “Name of Your IRA Custodian/ for the benefit of /Rafael Vazquez Roth IRA.”
#3 Use an attorney and/or title company who understands self-directed IRA investment transactions.
That’s the short version. I’m not an attorney or anything, but I would be happy to give more detail if you have a deal in the pipeline you want to put into your Roth IRA.