No, I don't think so ( ..but I'm tagging George in case I'm wrong)
My M.O is to use the status function & segregate my files as Projections, etc.
I move all the returns that were actually FILED (including any amended ones..) to a status called "To Be Proformaed".
Then F-3, select all of those, & proforma awaaaaaaay.
FYI, I wouldn't proforma all (or even any, unless it's a file you are using for projections...) until January (at the earliest). There WILL be changes/fixes/updates.
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You can suppress Organizer in Screen 3 - Organizer Miscellaneous
I do not know of any way of automatically suppressing proforma. I would use a distinctive client numbering for testing - such as TESTXXXX or PROJXXXX as the client number so that they would be easy to sort out when you finally do the proforma. I would hold off as long as possible on doing the proforma to allow updates to fix the inevitable OOPS!