I ended up getting on with CRA (hold for an hour and a half, haha) and got my question answered. The only return that needs to be filed (by mail with receipts and such attached) is the Final Return. IF all information isn't available or the estate has a lot of parts to be finalised then you have 1 year from DOD to file a TRUST Return. CRA requires that a form is on file with the government from the Executor of the Estate (listed in the deceased's Will) in order to allow for any communication with the CRA about the deceased's file.
