Answer :
Ted and Susan will file a joint tax return because they are married. The father-in-law and mother-in-law of a taxpayer do not have to reside with the taxpayer for the entire tax year in order for them to pass the member of household or relationship test.
Demonstrate joint return?
A married couple that got hitched before the end of the tax year files a single tax return known as a joint tax return, on which they list their combined income, credits, exemptions, and deductions. Filing together as a married couple. If you're married, you and your partner can submit a joint tax return. All of your income, deductions, and credits must be reported on that return if you are filing jointly. You can file a joint return even if one of you had no income or deductions. Despite the obvious advantages of filing jointly, there are some circumstances where it may be better to file separately.
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