It is almost always better to file jointly, even if one spouse has little or no income. Many important deductions and credits are limited or disallowed if you file separately. However, the only way to test it for your particular situation is to try it both ways. Note that if you are using TurboTax online, you will need three separate online accounts with different passwords and usernames; one for the joint return and one for each separate return. Make sure to only filed a return you intend to file and clear the others when you are finished.
