SSA-1099 O/A income

I received SSA-1099 O/A benefit statement for a payment made to me on behalf of my deceased mother's estate (my name and social security number). I know I could add this amount to my mom's final 1040, but do I  add the O/A amount to her regular SSA-1099 statement? TurboTax only allows me to enter one SSA-1099, not 2.  

 

Thank you!