W2s: Adjust the F07830 workfile?

  I know this doesn't sound kosher, but is it possible to systematically adjust the workfile F07830? Or do adjustments have to be done in the detail and / or behind the scenes? If so, where / how would I do that?

We have some tax exempt people who had some taxable wages slip thru. Although those payments were voided and reissued with the correct tax exempt pay type, it seems like they are getting pulled into the workfile.

Gross = $9999 (or whatever), Excludable = $9999 (or whatever), Taxable = 0. But it's basically creating a 0.00 W2.

We just want to eliminate them from the F07830 file in the best way.