I wrote off a vehicle last year that I purchased. Looking to purchase another vehicle this year and want to make sure that I can write it off as well.

There is no restrictions, you can buy a vehicle every year if you'd like.

If you are using the vehicle 100% in your business, it can be "written off" as well.  If you sold the first vehicle or are no longer using it in your business, you will have a few more questions to answer when you get ready to work on the Business section of your 2020 return.  TurboTax will walk you through it.