First, I would like to express my condolences on the passing of your mother.
Yes, you can file your Mother's taxes who passed away in October 2018. You will need to set up a separate account for your Mother's Tax return.
As you start the TurboTax interview, under the Personal Information section, you should choose "I'm preparing this return for ______ who is deceased". Next, you should enter the date of death. From here you can prepare her return as you normally would.
