What expenses do you need to enter? If you have self employment expenses you need to upgrade to Premium version.
What expenses are you trying to enter? If you are self-employed and you are trying to enter business expenses, you need to prepare a Schedule C. Your question is being posted from online Deluxe, which cannot prepare a Schedule C. You need online Premium or any version of the CD/download in order to prepare a Schedule C.
If you are a W-2 employee, there are no federal deductions for job-related expenses.
W-2 employees cannot deduct job-related expenses on a federal return. Job-related expenses were eliminated as a federal deduction for W-2 employees by the tax laws that changed for 2018 and beyond. Your state tax laws might be different in AL, AR, CA, HI, MN, NY or PA.
If you live in a state that lets you deduct job-related expenses, the information will flow from your federal return to the state return, so enter it in Federal>Deductions and Credits>Employment Expenses>Job-Related Expenses