One significant aspect of estate planning is income tax. There is less planning that can be done after the taxpayer has died. However, panning in advance can save tax and leave a map for the executor to navigate the estate.
moreover, There is no single solution for all estates. In my experience this is one of the most complex and highest stakes situations for personal income tax in Canada. The assets, income, and tax of the deceased, the needs and income level of the beneficiaries, and any charitable donations all must find a way to fit together optimally. Certain steps and transactions need to occur within limited timeframes and must be documented and reported in specific ways. And these rules keep changing.