<HTML>You cannot save the filled form in Acrobot Reader. But you can print them.
According to this clue, you may download a software named Win2PDF that can let you save any documents as PDF documents in applications that support print function. But, again, you will get ad info on your last page and the quality may not be as good as the original one.
Another way is to use the online service from Acrobot, not sure if it's free and never try it.
If you can get full version of Acrobot, there is no problem at all. This is nonsense.</HTML>