Started business as amazon seller in 2018. Paid large amount to OMR for classes on how to sell on amazon. Is class fee business expense and where do I list it in forms?

Class was $22,995 and paid in 2018 before started actually selling on Amazon.  Can I list class as business expenses?  Pre-startup expense?  I am shutting down the business in April 2019.  Sales were a loss with all fees from amazon in 2018 and 2019.  Single proprietor and business listed under my SSN. (never formed LLC) Less than 35 sales total between 2 years.  

using Turbotax Home and Business version (upgraded to do this amazon sales profit/loss stuff).