To claim most work-related expenses, you must itemize deductions. You can deduct only the portion of your work-related expenses that exceeds the IRS floor: 2 percent of adjusted gross income. 

Form 2106—Employee Business Expenses—is used to report unreimbursed travel, meals, entertainment, and transportation expenses (including DOT per diem) you incurred while working as an employee. (Form 2106-EZ is a simplified version.)

We automatically create Form 2106 or 2106-EZ when you go through the job-related expenses part of the interview. You can get there by searching for "2106" inside your TurboTax program and then clicking the "Jump to" link in the search results.