Final answer:
Marco and Tatiana should use 'Married filing separately' as their filing status for the 2022 tax year since they are married but choose to file their taxes separately.
Step-by-step explanation:
Marco and Tatiana, who are married and have chosen to file their taxes separately for the tax year 2022, would use the filing status of Married filing separately. It is important to note that while they are married, they have the option to file their taxes together as “Married filing jointly” or separately. The term “Head of household” is another filing status that may provide tax benefits if they meet certain criteria, such as paying more than half the cost of keeping up a home for the year and having a qualifying person living with them. However, simply being married does not qualify one for this status. “Single” is not a correct filing status for individuals who are legally married, regardless of whether they file together or separately.