Due to the Tax Cuts and Jobs Act, you cannot claim unreimbursed employee expenses for the 2018 tax year unless you are a reservist, qualifying government employee, performing artist or an employee with impairment related work expenses.
However, you can still claim unreimbursed employee expenses if you are filing a return for tax years prior to 2018.
To enter your auto expenses, the occupation field must be completed. Once you click on 'Continue', the entry boxes will become available