My tax payment has not cleared yet

[ErinH · Accepted solution]

The IRS or State government withdraws your taxes due, not TurboTax. 

As long as you filed timely you will not be penalized because the IRS/State did not withdraw the money by the 18th.  To verify the date that Federal funds will be withdrawn from your account, confirm that funds have been transferred, or cancel the transaction up to 48 hours before the date you designated the funds to be debited, call the IRS at 1 (888) 353-4537.    

https://ttlc.intuit.com/replies/3299924