How did it get filed? If she passed in 2024 you can still file as Married Joint. Do you have a dependent? You can file a Joint return as normal the year your spouse died. For the next two years following a husband's or wife's death, the surviving spouse can file as a qualifying widow or widower if they have a qualifying child. That basically lets you continue to use the same tax brackets that apply to married-filing-jointly returns. After the year of death if you don't have a child you file as Single.
