The AGRIS 17.4.0 release has added:
AGS-903 W-2 Form -
...
multiple Box-12 Codes
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now add together for reporting
W-2 Box 12 is now automatically filled on the standard graphic W-2 forms. Each letter (type of deduction) is summed and displayed on a single box 12 line. There are a maximum of four types displayed since there are only four lines for box 12 on the W-2 forms.