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My check was $500 short. I have not filed 2019 so they went based on 2018. There was a mistake in my original tax form where I had a social security number wrong for one of the children so they went back and corrected it after the it was processed originally. How do we contact IRS to have the $500 additional reissued? This has me in a bad situation because we were counting on that extra $500 to get through the month.