If you apply service update 17 for MAS 90 and MAS200 version 4.3, W2 form printing may experience issues. The Data Dictionary appears to lose the Cobra fields. Sage is working on a high priority fix. For the time being hold off on applying Service Update 17.
If you’ve already downloaded Service Update 17, a fix for the issue (PR4030-T) appears to be downloading and installing the 2009 941 update again. You do not have to rename any files just download and re-install the PR4030-T update to the MAS 90 directory.