I reported my tax to IRS 3 weeks ago. At that time, I thought I didn't receive the first and second Economic Impact Payment. So I reported $1800 at Recovery Rebate Credit. But today I received the notice 1444-B letter by mail which claimed that the second Economic Impact Payment had been issued to me. The notice date on 1444-B letter was March 26, 2021. Then I checked my bank account, I realized that the $600 second Economic Impact Payment was issued to me in January. Thus, I should have reported $1200 for Recovery Rebate Credit in my tax return. I am just wondering how can I correct the mistake for Recovery Rebate Credit in my tax report? I reported $1800 by mistake, the correct amount is $1200. Up till now, I didn't hear from IRS except the notice 1444-B.