What is the filing status of a married couple with no other income filing jointly just for a tax credit?

The filing status for a married couple with no other income who choose to file jointly primarily for a tax credit is "Married filing jointly." This status is available to couples who are legally married and allows them to combine their incomes and deductions on one tax return.

Filing jointly often results in various tax benefits, such as higher income thresholds for tax brackets and eligibility for certain tax credits that are not available if filing separately. It is designed to provide a simplified process to report earnings and take advantage of available tax benefits as a unit instead of separately, which might reduce potential tax liabilities.

In contrast, the other options represent different tax filing statuses that do not align with the scenario provided. For instance, "Single" applies to individuals who are not married, "Head of household" is reserved for single parents who support dependents, and "Married filing separately" is typically less beneficial for couples since it can lead to a higher overall tax burden.