The Filing Copy, is merely what THE PREPARER has selected to print as his filing copy through File>Print Options>Global Print Options>Control Which Forms Print. There is no difference in the method of the preparer in determining what prints with each copy.

Based on all the software problems, do you have real confidence that anyone who knows the real world of tax preparation at Pro Series is spending a bunch of time in determining what Pro Series decides what the defaults are in this area.?

If you scroll through the forms list that comes up through the print options above, there are not very many differences as to what prints for each copy.

I only print one copy, (I chose Filing Copy) so I have modified that copy to fit my needs, and I doubt the extra forms I print with that (Diagnostics etc.) are included in the transmission file.

I may be wrong, but I doubt that any of us will ever know what actually goes in the transmission.