Where do I find the car and truck expense work sheet for adding a replacement vehicle?

In TurboTax Premium Online, report the new vehicle by following these steps:

• Down the left side of the screen, click Federal.
• Down the left side of the screen, click Wages & Income.
• Click on the drop down arrow to the right of Self-employment.
• Click to the right of Self-employment income and expenses.
• At the screen Your 2024 self-employed work summary, select Edit.
• Select the pencil icon to the right of Vehicle.
• Click the pencil icon to the right of the vehicle or select Add another vehicle.
• Enter vehicle information.

I'm using desktop version of Turbo Tax.

The steps for the Desktop version are very similar.  Here's how:

• At the top of the screen, click Federal Taxes.
• At the top of the screen, click Wages & Income.
• Select "I'll choose what I work on."
• Scroll to Business Items, then select Business Income and Expenses (Sch C)
• At the screen Business summary, select Edit.
• Continue through the interview until you arrive at business expenses.
• Select update to the right of Cars, trucks, and other vehicle expenses
• Now, select Add a vehicle.
• Enter vehicle information.