Unfortunately, telecommuting expenses for W2 wage earners have been eliminated as deductions under the new tax laws.
However, the IRS is encouraging employers to reimburse employees for these expenses.
You need to check with your employer to determine if they will approve and reimburse your job related expenses.
For more information, follow these links:
Misc Deductions 2018
https://ttlc.intuit.com/questions/1901224-can-i-take-the-home-office-deduction