Where do I deduct a payment from my employer that was a reimbursement to me in 2019

Where do I deduct a payment from my employer that was actually a reimbursement to me in 2019 for required malpractice insurance which I originally paid out of my pocket. The reimbursement which was paid to me was included under Wages, Tips, Other Compensation on the 2019 W-2. Now I am paying taxes on that amount which needs to be deducted from my income so I am not paying taxes on an amount which originally came from me.