Retirement tax questions

the entire payment is taxable...even though Box 2 is blank....in TT, Box 2a must equal Box 1. 

 

also, whose SSN is on this form? if your grandfather's. it doesn't go on your tax return in any event. 

 

or is it your SSN as this payment is a beneficial payment from his pension (which is why Box 7 is a '4'). if that is the case, it does belong on your tax return - again BoX 2a must equal Box 1