No DON'T do that! You can not compare that in the Online version. If you are using the Online version don't go changing it around. It won't work and won't give you the right results. And it will mess up your account and return. You just can't change from joint to separate. For Online you would have to set up 3 accounts, 1 Joint and 1 each for both of you separate. You don't have to pay unless you want to print or file.
You can do multiple returns in the Desktop program. And it has a What-If Worksheet you can use to compare them.
