I forgot to put a t4a (P) on my decease father in law tax return do I need to file another return the one with turbo tax seems locked.

 

Getting started

Sorry to hear about the passing of your father.

 

No, you will need to wait for the Notice of Assessment which will show you if CRA caught the mistake and fixed it for you. This happens, if you notice it wasn't added, then you can contact them.