As MinhT1 explains above, you are an employee of an S-Corporation and the Tax Cuts and Jobs Act of 2017 eliminated the deduction for employees to claim unreimbursed job expenses (including home office) on their personal tax returns.
However, there are alternative ways of handling this situation:
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The S corporation can pay you rent for the home office.
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The S corporation can pay you for the costs of a home office under an "accountable" plan for employee business expense reimbursement.
Please see this Intuit ProConnect article for more information: S-corporation home office deductions, reimbursements and expenses
