It depends. You only need to amend if adding the expenses you paid for your car will change your total refund or tax due.
Here is the explanation:
By purchasing a car would give you an opportunity to possibly deduct the car registration fees, sales tax, and personal property taxes if you pay them. You cannot deduct the cost you paid for the car though.
However, these are all allowable deductions on your Schedule A. You can benefit them only if you have enough to itemize. You would benefit from those abovementioned three taxes only if the totals along with other itemized items, if there are any, on the Schedule A, are more than your standard deduction amount (click here to check standard deduction amount). Also be aware that, with the Tax Cuts and Job Acts TCJA, there is a limitation of $10,000 so-called the SALT applied (State and Local Taxes ). For more information, see SALT. Instead of allowing all the paid state and local taxes including sales tax and property taxes for deductions, Congress imposes a cap in the calculation. Therefore, if your total SALT exceeds $10,000, you can only use 10,000 in calculating your total itemized deduction amount.
In conclusion, if you have enough to itemize including those vehicle-related taxes on Schedule A, you should amend to re-claim an additional refund. If you do not have enough to itemize, you do not amend.
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