MFS tax filers can claim education credits.
MFS tax filers can claim EIC (Earned Income Credit).
MFS tax filers can claim exemptions, if they have them.
Single and MFS
MFJ and HOH
HOH and Single
MFS and HOH
Claim different deduction types (e.g. student claims itemized deductions, spouse standard deductions).
Claim the same deduction type (e.g. both standard deductions or both itemized deductions).
Amend to a MFJ status, especially if they're still married.
Both options 2 and 3 are correct.
ONLY Line 2 amounts on the 1040X will change
ONLY Line 3 amounts on the 1040X will change
Various line amounts on the 1040X can potentially change with the filing status change.
Wages, Salaries, Tips, etc.
Anything that can be attributed to only 1 of the taxpayers that filed jointly.
None of the above
Should be divided in half on the SOI form.
Should be given to the student in full on the SOI form.
Should not be on the SOI form at all.
Here's an interesting quiz for you.