I am sorry to hear of your loss.
To file tax returns for the estate of the deceased, you’ll need to file a T3 return. Unfortunately, there is no version of TurboTax that can be used to prepare a T3 Trust Income Tax and Information Return. However, Intuit offers another product called Profile OnePay that can do T3 returns. You can read more about it here: http://profile.intuit.ca/professional-tax-software/profile-onepay.jsp
Please note that if you use Profile OnePay, you’ll have to mail in your return. Profile doesn’t use NEFTILE to send returns online, it uses EFILE. EFILE is meant for tax professionals and requires an EFILE account.