Click My info in
the left column and scroll down to marital
status and make sure you have Married selected.
If not select the pencil to the right to edit and change it. From there you
will be able to add your wife and be given the option to file jointly. Until you do this you will not see an option to add income for her. let me know if you need more help. Also you will need to update from using the Free Edition to add the 1099 misc.