a) Do I claim full depreciation on my private vehicle or only that portion that is used for business purposes, using the business mileage % of the total annual mileage, as the apportionment figure? b) Do I claim the full depreciation on my cell phone or only the business portion as well? c) Am I able to claim the depreciation on my vehicle and cell phone for previous tax years if I did not do so at the time?
You can only claim the portions used for business purposes, and only so long as you can demonstrate to SARS the basis for this, i.e. actual records that you have made over time. You can go back and reopen you old returns in order to try and depreciate for previous years if you like.