Yes, TurboTax will send you an email with instructions on how to pay your TurboTax fees (minus the Pay With My Refund fee, if any) by a certain date. The below TurboTax Help article provides more details about how to pay your fees when they aren't deducted from your refund. Even though your situation is that your check is being mailed, the process remains the same.
What if my federal refund isn't enough to cover my TurboTax fees?
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