Deductions & credits

I am having trouble understanding if I can use the employee home office deduction.  I read that it's been eliminated as part of the Tax Cuts and Jobs Act.  (for W-2 employees)  But then I also find that if it was for "employer convenience" then it may be allowed.  Turbotax allowed me to enter my data and gave me a deduction.  (using the simplified version)   Do you know whether it's still an active deduction for W2 employees. I searched IRS rules and it was not helpful.  Thanks.