Nope

why does pro series allow to efile an amended state when I wasn't the original preparer of the return but not the same for the federal.

Thanks

We don't know.

thanks for your honesty. I guess it's one of those mysteries in the software world.

Other than postage and delivery time, what do you expect to lose with a paper 1040-X?  Either way it's going to be reviewed by at least one IRS examiner, and usually two.