You can't do that with Adobe Reader unless the person that created the form has added fillable form fields.
It should have given you a message if that were the case but to double check,choose the hand tool and mouse over the areas that look fillable. If they are fillable, the hand tool will turn in to an i-beam.
Thanks - Apparently the forms I can open have not been setup to allow typing on them. Do you know of any way to activate typing permission? I think I have filled out forms in the past. Do you know of any other way this can be done? Thanks again, H Edward
The answer to both of you is yes, it can be done.
But not with Reader.
You can have a PDF of a form and, using Adobe Acrobat, create the fillable fields in that PDF.