Kimberly is divorced and the custodial parent of a three-year-old girl named Bailey. Kimberly and Bailey live with Kimberly’s parents, who pay all the costs of maintaining the household (such as mortgage, property taxes, and food).
Kimberly pays for Bailey’s clothing, entertainment, and health insurance costs.
These costs comprised only a small part of the total costs of maintaining the household. Kimberly does not qualify as her parents’ dependent.

a. Determine the appropriate filing status for Kimberly.

b. What if Kimberly lived in her own home and provided all the costs of maintaining the household?