My taxes are filed, I don't have anything special from turbotax, but I am being charged $15 a month.
That sounds like a subscription to Quickbooks online for self-employed. Contact customer support to cancel. Customer support can be reached via Twitter, Facebook or telephone. https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
For telephone and other support options, see the instructions below.
https://ttlc.intuit.com/replies/5566005