If the deceased person meets the filing requirements, a tax return will need to be filed. Their surviving spouse can file if there is no executor of the estate. If she wasn't married, as a survivor of the deceased, you can file her tax return and claim her refund if there's one.
You will use the taxpayer's SSN, not yours when you file taxes for a deceased taxpayer. For more information, refer to the
TurboTax article regarding filing a final tax return and the IRS article File the Final Income Tax Returns of a Deceased Person.
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