Filing for Deceased - Need Help

My Dad passed away Oct 2020 and I'm told I need to file a final return. This is super confusing to me as there seems to be conflicting information. I read that I can file this using TurboTax Standard but some say I can't and need to do a T3 Trust return instead which I have no idea what that is.

 

In TurboTax Standard when I create a new return, the first question it asks:

 

What's your marital status?
On December 31,2020 ,you were:
Married
Living Common Law
Widowed
Divorced
Separated
Single

 

There's no option to choose deceased...

 

My Dad had no will and no income except for CPP and OAS. His only assets was a joint bank account shared with my Mom to which the CPP and OAS were deposited.

 

I'm not sure how to proceed.

 

Thanks.