I have a similar situation. My parents each received a stimulus check for $1,200 in April 2020. My dad died in July 2020. My mom received a $600 stimulus check in January 2021. TurboTax calculates that my dad is eligible for a $600 stimulus check and thus enters it in the TaxReturn. I would think that TurboTax would use the date of death to determine that my dad is not eligible for the second stimulus check. If TurboTax does not fix this problem, I will enter that my dad did receive the $600 stimulus check and then the generated TaxReturn will be correct (it won't request a $600 refund that the IRS would have to review and then reject).
