There is no “flat rate”
calculation method for business, employment or rental related automobile
expenses. To claim those expenses, you must have receipts with the actual
costs, as well as a log book that records your business kilometers traveled.
There is, however, a simplified way to do a logbook, but that only determines
your business use of the vehicle.
T777 Statement of Employment
Expenses (PDF)
https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/t777/t777-15e.pdf
CRA page regarding Motor vehicle
expenses (not including CCA):
https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partners...
