I used a vehicle for delivery driving purposes as a side job. This car was in an accident and totaled...insurance gave us $10,000 for it which is what we owed on the loan

[kevintatyana-grant]

What do I put for the Basis for gain/loss section?

[DavidD66]

Your basis is what you paid for the vehicle, less any depreciation you took.  If you used the standard mileage rate, it is the total of the depreciation component of the mileage you deducted.  

The depreciation component of the IRS standard mileage rate represents the portion of the rate that reduces your vehicle's cost basis over time, even though you do not deduct it separately. For 2026, this amount is 35 cents per mile. For 2025, it was 33 cents, and for 2024 it was 30 cents per mile.

Depreciation Rates:

• 2026 Depreciation Component: 35 cents per mile (based on 72.5 cents total rate).
• 2025 Depreciation Component: 33 cents per mile (based on 70 cents total rate).
• 2024 Depreciation Component: 30 cents per mile (based on 67 cents total rate).

The depreciation allowed is calculated by multiplying the business miles driven by the rate for that specific year (e.g., 10,000 miles in 2024 x 0.30 = $3,000 of depreciation.

[AmeliesUncle]

If it was used for more than just 2025, don't enter anything and go to a good tax professional (an in-person appointment with somebody that a friend or relative recommends; NOT the "live" version of TurdoTax that uses the defective software).   TurdoTax does NOT support assets or vehicles that have varied in business percentage from year to year.