Capital Cost allowance in 2016 was $30,000 (net of sales tax) x (.3)x(.5) = $4,500 (Biz KM/ TTL Km driven) = net CCA which results in a UCC for 2017 of $30K - $4,500 = $26,500 x .3 = $7950 (Biz KM/ TTL Km driven) =$3084.48 which judging by the answer provided in Turbo Tax indicates you are using your vehicle 31% of the time for business.