I question that since you're a W-2 employee. Per IRS Publication 529 at <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/p529.pdf">https://www.irs.gov/pub/irs-pdf/p529.pdf</a> on page 2, the only way you can claim and deduct your job related expenses are if you meet at least one of the four exceptions listed below.
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You can no longer claim a deduction for unreimbursed
employee expenses unless you fall into one of the following
categories of employment, or have certain qualified
educator expenses.
• Armed Forces reservists.
• Qualified performing artists.
• Fee-basis state or local government officials.
• Employees with impairment-related work expenses.
I don't see anything in that publication addressing percentage of employment from home.
