Please see the FAQ below.
If you requested your TurboTax fees be deducted from your federal tax refund and the IRS has held your refund over 45 days after your original estimated refund date then TurboTax will request payment for use of the software to prepare your return.
"...you'll receive a Request for Payment email, which includes instructions on how you can pay your TurboTax fees (minus the Refund Processing fee, if any)."
https://ttlc.intuit.com/replies/4169801
