Business travel claims with no travel allowance

How does one go about claiming a vehicle that I use 70% for business and 30% private. I have a detailed log book and do about 18,000km business travel/year but I do not receive a travel allowance.

What sort of work do you do, are you salaried or commission based?

I'm in sales. Get a basic and commission. Comm is between 2-6k.

If your commission is more than 50% of your overall income then you can deduct expenses against this income. You would include the amount under travel expense using the calculation on our Travel Allowance calculator.