The spousal amount is
automatically calculated if your spouse has a low enough income (less than
$11,635 in 2017). If you are preparing your return separately from your spouse,
you can enter their income information by selecting “Additional Information
about [SPOUSE]” under the “Setting Up” tab. If you don’t see the “Setting Up”
tab yet, then you can use the “Back” button to go back to the “Tell us more
about [Spouse]” page.