That's kind of the catch 22 of the whole thing. You're not allowed to work, get a driver's license, or otherwise be part of society and you need those things to prove you've been here. Anything helps really, doctor's appointments, library card, etc.
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Late 40's Dreamer (Holy Fucking shit I'm almost 50 and still dealing with this), aged out of original DACA and didn't have a chance to apply for extended DACA after Republicans killed it on the vine.