If the IRS adjusted your refund or it's taking too long and you still need to pay the fees you should get an email and directed to pay here. If you don't pay the SBTPG bank will directly debit your account.
https://payments.turbotax.intuit.com See What if the IRS reduces your refund or delays it? Expand the first section
https://ttlc.intuit.com/questions/2552376-what-if-my-federal-refund-isn-t-enough-to-cover-my-turbota...
