Hi ajunglebum! Not fun to have costly car repairs! You can definitely amend your taxes. If you used TurboTax to prepare your return, that is very simple just like when you prepared.
https://turbotax.intuit.com/tax-tips/amend-return/how-to-correct-federal-tax-returns/L67t0F7il
When you work on the Vehicle section within your self employed business you will need to consider the IRS law for the vehicle expense according to the method you chose for your business miles. Here is a great article on business use of personal vehicles,
https://turbotax.intuit.com/tax-tips/self-employment-taxes/standard-mileage-vs-actual-expenses-getti...
When working on your amended tax return, if you have any questions reach out to TurboTax Live.
Hope you find this helpful!
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