"Joint filing" refers to the act of submitting official documents or forms together with another person or entity. It usually implies that both parties are collaborating and sharing responsibility in the filing process. Full definition
Most couples opt for joint filing because it reduces their tax bill, but when couples file jointly, both spouses are responsible for the taxes due. (divorcesource.com)
In most cases, the lowest tax liability with be pursuant to a married filing joint filing status. (pollockbegg.com)
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