Buying a personal car and making payments on it doesn't qualify for any tax deduction. However, the vehicle registration fees may be deductible, but these are an itemized deduction so you must itemize to get any benefit.
You get to take the standard or itemized deductions, whichever was greater. The standard deduction is $6,300 (single) and $12,600 (married), so if you don't have additional itemized deductions it won't be worth upgrading. Typically the largest itemized deductions come from mortgage interest and property taxes on a home. However, the software will walk you through all of this.
You can find out more about entering your vehicle registration fees and if the state you paid them in qualifies by going to the Federal Taxes >> Deductions & Credits >> Cars and Other Things You Own >> Car Registration Fees.