Change return, mark Line H4 (Amended Return) on page 1 of S Corp return 

So, it doesn't matter if it this represents the second amended return?

I don't know the answer to that.  Not even sure if it's possible to efile a second amended return but if the first amendment has been efiled and an acknowledgment received  why not try?

"Client is requesting a second change"

Or, new info brought to your attention means you realize there needs to be another amendment? Because you should be driving that bus, of course.

I was really just trying to find out if it was possible to file an amended return in ProSeries or if there are any system limitations or if system lacked the capability.  I didn't want to make the changes on a second amended return and have it rejected.