Our condolences for your loss.
If you are getting refund, then the tax return actually must be paper filed and Form 1310 must be added. This is the form the IRS needs in order to issue a check for a deceased person in someone else's name.
Persons passing away after December 31, 2019 may be eligible for both stimulus payments on the 2020 tax return.
For more information, see:
Recovery Rebate Credit — Topic B: Eligibility | Internal Revenue Service
Can I file Form 1310 in TurboTax?
Death in the Family - TurboTax Tax Tips & Videos
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