1. Business km is platform km plus the gap
Start with what the apps reported, then add off-platform business driving they never counted (hot zones, between apps, car wash). Do not also log every on-platform delivery as a manual trip — that double-counts the same kilometres and inflates the %.
2. Total km is best from two odometer readings
Year-start and year-end (or first and last reading in the tax year) give total kilometres driven. Personal km is then whatever is left after business km. Without two readings, you are reconstructing personal km from logs — easier to miss mixed use.
3. The percentage, not a per-km rate
Business-use % = business km ÷ total km. Fuel, insurance, and maintenance are typically multiplied by that percentage on Chart A. That is not the CRA optional per-kilometre method. Parking tied to the work is often claimed in full — keep receipts either way.
4. A 100% figure is a warning, not a goal
If business km meets or exceeds total km, the worksheet will show 100% business use. That can be true for a dedicated work vehicle; it can also mean missing personal km or double-counted platform trips. Check odometer and imports before you export.
5. Export a worksheet, not a filed return
Use the % and category totals as a T2125-style summary for you or your CPA. Confirm current CRA rules for your situation — a worksheet is not a filed T2125.