You cannot add your car you bought in 2025 to your 2024 return if it is for business, you will need to wait until you file your 2025 return.
If it is for personal use, including going to work as an employee, unless you are itemizing and taking the sales tax deduction, your car does not go on your return. Again, since you bought it in 2025, you cannot put it on your 2024 return. You would have to wait to take the sale tax deduction until 2025.
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