Please contact
us at (800)446-8848 5am to 9pm Pacific, to see if other payment arrangements can be made.
https://ttlc.intuit.com/replies/3300041
I have also listed a TurboTax FAQ below, with some information that may help explain why your return may be taking longer:
Why do some refunds take longer than others?
https://ttlc.intuit.com/replies/3302330