A Joint Tax Return is a tax form filed by a married couple together, reporting their combined income, deductions, and credits. This option often results in a lower tax liability compared to filing separately, as it allows couples to take advantage of various tax benefits and credits available to joint filers. When filing a joint return, both spouses are responsible for the accuracy of the information provided and any taxes owed. This means that if one spouse makes an error or underreports income, both can be held liable. Couples can file a joint return using forms like the IRS Form 1040.