If your refund is less than expected, even after taking into account the service fee to pay out of the Federal refund, then the IRS may have changed something in your return. In that case you should receive a letter from the IRS in about 3 weeks or so explaining why.
If you want TurboTax Support to doublecheck your fees to be sure you were charged correctly, here's how to reach them during business hours:
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/replies/3300041
