Uncashed stimulus check

The first stimulus check for $2400 was received as a paper check and written to both me and my deceased spouse.   Long story short, the check was not cashed or deposited, mobile deposit was reported as received and accepted but then ultimately denied most likely because only I could sign the check and  it was written to both of us.  The check was issued over a year ago now and I just discovered this today.  Yup, I should have confirmed it was in the bank way earlier... it's been a very disconcerting year.

 

In Turbo Tax, can I enter 0 for the amount of the first stimulus check and $600 for the amount of the second stimulus check, or do I need to contact the IRS first?  This would generate a $3000 credit due to married filing jointly as a widower.  Both the $600 and 3rd $1400 checks were successfully deposited.

Thanks.