well since I am a CPA, we don't hire one for our S-corp, but I don't actively prepare other clients books/taxes so I don't purchase the expensive bookkeeping software that would have depreciation calculations.  I just don't understand why calculating depreciation is so "exclusive" and isn't included in basic accounting software such as quickbooks, given that almost every business has fixed assets that need to be depreciation (though I realize depreciation is much less of an issue with the new tax laws).