No...Just ignore the "20"
The "20" just refers to a makeup contribution for a 2020 , but made in 2021 , thus, the "20"
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As @dmertz has noted in another post (though no AA20 in your case):
"The 20 after the D and after the AA indicates a contribution made in 2021 as a make-up contribution for 2020 under the Uniformed Services Employment and Reemployment Rights Act of 1994."
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
