DKMY, I tried to re-create a new return without entering the year of death but it still not able to submit by Netfile. I think it is not Ufile that cannot do it, but CRA declined it. The reason I said that is because after my dad passed away, I filed a form to notify CRA about it (for other reason such as stop sending his OAS etc). Shortly after that, CRA stopped my Dad's online CRA account access. So I suspect as part of that process, CRA will not allow any electronic filing even it is not the final return (unless you haven't inform them yet)