If you paid your taxes this year you automatically get it. No forms to fill out.
unless:
you used a TIN and not a SSN or were claimed on another return or owe any back taxes, child support, student loans or anything else Uncle is required to collect first or you were in on a scam to hike subscription fees by telling the masses it would be good for them when you were really buying Porches
Uncle doesn't email anybody unless specifically requested