If you cannot use the downloaded version because your system is not up to par and you will not be buying a new computer then you can still use the ONLINE version ... if you already bought the CD/Downloaded version put in for a refund of the fees paid as they cannot be transferred to the Online product.
https://turbotax.intuit.com/personal-taxes/online/
Go to this TurboTax website to request a refund for the software purchased from TurboTax - https://support.turbotax.intuit.com/forms/refund-request.jsp
