CRA allows a return for a deceased person to be efiled but it seems that the TurboTax downloaded software does not support it unless I'm missing something.

If you've recently lost a loved one, we'd like to first offer our sincere condolences for your loss. 

Unfortunately, the CRA (Canada Revenue Agency), requires all final returns to be physically processed. You will need to print out and mail their return directly, and cannot use any electronic filing options. 

If you use the TurboTax downloaded software, please following these steps: 

When starting the return process, select Yes to the question "Are you preparing a return for someone who passed away?", then follow the instructions below:

1. Select the period of the DOD (date of death)
2. Choose the province where the deceased resided right before the DOD
3. Enter the personal information of the deceased and the DOD
4. Enter the mailing address of where the notice of assessment should be sent.
5. Enter the information of the spouse/ common/law partner, including the net income and provincial tax line 8 from the provincial 428 form
6. Select the type of income you are reporting for the deceased. If you are reporting an income that is eligible for splitting, the software will calculate the eligible amount to be transferred to your spouse/common-law partner. This amount will be reported separately in the partner’s tax return
7. If you are transferring a principal residence to the spouse/common-law partner, enter the information of the purchased price and the FMV (fair market value), on the DOD. Select yes to the questions “was the property disposed of as a result of death?”. Then select who is the property transferred to
8. You can check the information entered from the forms view on the top blue bar.  Just select Forms and choose T1-General.   

For more information, this link from our website will be useful.

How to file a final return for someone who has passed away.

Thank you for choosing TurboTax.