Hello Joeystein1,
When you prepared your tax return, you would have been asked to confirm the amount you received as stimulus during 2021.
The IRS sent a Letter 6475 to help taxpayers to report the correct amount.
If the amount you reported was different from the amount the IRS had in their records, then the IRS adjusts your tax return to reflect the correct stimulus amount that they sent to you during the year. Such an adjustment will result in a change in your refund.
https://www.irs.gov/newsroom/what-people-should-do-if-their-third-round-economic-impact-payments-are...
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