The state software goes with the software you are using for the federal return. The information flows from the federal return to the state return. You cannot use the CD/download (if that is what you are doing) and then use online TT for a stand alone state return---it just does not work that way. If you already have desktop software (Basic or Deluxe without state software?) then it is an extra fee to download state software. There is also a fee to e-file a state return using desktop software but you can avoid that fee if you print and mail the state return instead of e-filing it.
**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.**