Unexpected refund

I filed in March 2022, and today I got a very small refund check.  Notation ANDOVE.  I triple checked estimated tax payments, and I do not qualify for any of the common credits that were sent out in 2021, so this is a puzzle.  Bringing up the program today, no updates for Federal so it should have been up to date on filing.  I do get penalized, as my income is not steady, with a large amount in the fourth quarter, so the IRS doesn't like this.  I cannot make four equal payments as I never know what the fourth quarter will bring until that December.