This depends on who owns and operate the vehicles. There are three options:
Scope 1: Mobile Fuels: your company owns or operates the vehicle and you are responsible for its activity. In this scenario, you would enter your data using the fuel-based or distance based method under Scope 1 Commercial Vehicles.
Scope 3.8 Upstream Leased Assets: you lease the vehicle and do not have operational control. In this scenario, you would enter the Total emissions, measured in Kg CO2-eq. Other data calculation methods will go live in the app shortly!
Scope 3.4 Transportation and Distribution: a third-party company is delivering materials to you. In this scenario, you would enter your data using the fuel-based or distance-based method.