How do I claim vehicle kms - from home to the client workplace(s) It can be more than one client a day, then back home? I am eligible for T2200, salaried with commission

You can't claim any motor vehicle expenses for your commute to and from work. You can only claim expenses incurred while you were "at work". Ex: you can't claim expenses for driving from home to your first client or from your last client to home, but you can claim expenses for when you travel from between clients.