I paid taxes on Medicaid waiver payments. How do I record that on my taxes when I am only listing gross income, EIN, and comment “Notice 2014-7”?

I’ve been getting paid as a AT. and HAB provider for my son. I didn’t know this income was tax exempt, so I’ve been paying taxes on it. I’ve just found out about Notice 2014-7 and am changing to tax exempt however, I don’t know how to list taxes already paid on my taxes.