Married couples wishing to file tax a single tax return must choose which filling status when filing a federal income tax return?

Married couples wishing to file as a single taxpayer on a federal income tax return must choose the "Married Filing Jointly" status. However, if they wish to file separately while still being considered married, they can select "Married Filing Separately." It's important to note that there is no option for married couples to file as a single individual; the filing statuses are distinct for married taxpayers.