It is only for this tax year. It will not carry over to next year.
You can try contacting TurboTax Customer service using this link: Turbo Tax Customer Service
I called Customer Service and was told there is no way to revoke it. This is unacceptable. So I deleted my Turbotax return and ended up filing with another tax prep company, OLT, and it was free, even though I am self-employed.