You can use online, but you cannot pay using that license code. The pricing is structured differently for online. You will need to seek a refund for the CD/download and then pay for using online, according to the version of online that you use.
CD/DOWNLOAD REFUND https://support.turbotax.intuit.com/forms/refund-request.jsp
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**