These are likely Roth contributions. The AA is the current year and the AA22 are contributions that were made for 2022. This is common with a military W-2s.
on W2 in box 12 there is AA - $3200 and AA22 - $12 how do you combined them? Do you add $3200 + $12 with AA - $3212 and put down on taxes. If so then it won't match what's on your W2. Do I just ignore AA22 - $12 and only put AA - $3200. I've researched this and can not get a definitive answer on what to do!!!
As shown in the drop-down menu for Box 12, code AA is for Roth contributions to a 401(k) plan.
TurboTax will only allow code AA to be used once per Form W-2. You can either add the two figures together and enter the total on the AA line, or ask your employer as to why they have a separate amount identified as "AA22" in Box 12.
You can click "Add another box 12 item" for additional codes, but not another line for the same code.