When filing for total permanent disability for discharge of federal student loans what is the tax rate I will have to pay on $25,000

I've unfortunately reached a point with my disability that I am unable to work enough to pay for my student loans I have filed for total permanent disability. I found out when researching this that once the loan is forgiven the IRS considers all of it taxable income. Both subsidized and unsubsidized loans total around $25000.00. Could you counsel me on how much that will end up costing me in taxes and how I go about setting up some kind of payment plan for it. THank You,
[name removed]