Did you get an email to pay? If the IRS is still holding your refund 36 days after your original estimated refund date they will ask you to pay the fees or they will debit your bank account. See, What happens if the IRS reduces my refund.
https://ttlc.intuit.com/community/payments/help/what-if-my-federal-refund-isn-t-enough-to-cover-my-t...
