Schedule C Vehicle Figures

Where can you see turbotax's math?    I can't figure out where they get their vehicle numbers from.  I'm using actual expenses, 2021 was the first full year of service it was used for 11 months in 2020 

 

business portion of:

Depreciation is 6262

Repairs/maintenance: 638

Insurance: 2310

fuel: 7291

100% of the tolls: 350

 

total of 16,851   turbotax keeps giving me 18604

 

using the online self employed version,