since the SUV is under 6K lbs your depreciation is limited by IRC section 280F
for 2021 the maximum depreciation in the first year with 100% business use is $18,200 with 70% business use your deduction is 70% of that or $12,740.
Turbotax got it right
for more info see IRS PUB 946 page 59
for 2022 the max first year is $19,200 so you'll get an additional $700 deduction with 70% business use
https://www.irs.gov/pub/irs-drop/rp-22-17.pdf
the link also has the maximum depreciation with 100% business use for future years.
