The IRS does not email anyone. It could be a scam. Did you get a letter in the mail? The 1200 difference sounds like the Recovery Rebate Credit on 1040 line 30. Did you already get the 1st and 2nd Stimulus checks? You might have tried to claim it again. You had to enter what you already got into the right 2 boxes or Turbo Tax gave it to you again. Did you get the second 1200 after you filed?
