Sort of -  There is an issue if you have terminated employees since they are purged at year end when you go into eFiling the data is there for wages but not their employee information.  I think you could type it in but I haven't tried that.

I usually do it in the live company even after closing the year using efiling but make sure you have the backup copies just in case

That's great to know and is what I expected.  I called Sage yesterday and burnt one of my support cases on the 2 minute phone call.  They said that I still needed to do it in the copied company, however all of my testing suggests otherwise.  

We have made a point to stop terminating any employee and only mark them inactive so that we retain their history.  

I have backed up Mas as a whole and copied the individual companies, however I am going to try to efile from the live company.  If I encounter problems I'll post them here, however if not then I think it's safe to assume that it can be handled in this manner going forward.

We also make a copy of the company but also use the inactive rather than the terminated option to keep the employee data alive.

I have a further question.  In past years, it has been suggested that when you install a tax table update it is across all companies.  I understand that part.  But it had also been suggested that when you go to print the W-2's for the year that you need to roll back the tax table update so it does not recalculate the taxes.  I find it hard to believe that once the taxes are calculated for the year, they should not change.

Any input?