It’s not like there are people checking for immortals, I think it would be flagged by a dmv employee or something when they dont believe a clear 21 year old is actually 150. Let’s assume it’s current day im caught and not bring speculation on what the US is like in the year 2139 is like.
21? I hope you don’t like going anywhere. You’re going to get flagged either at 65 when someone tries to apply a senior discount in person or whenever they ask your date of birth for beer and you’re supposed to be on the back end of 40.
If you allow yourself to age to that timeless look you can probably get to 75 before anyone even gets suspicious.