Can I change state return from mail to e-file on the TurboTax CD/Downloads? Previous answer @ https://ttlc.intuit.com/replies/3985787 won't open.

Assuming that you have already e-filed the federal tax return and it has been Accepted by the IRS -

Click on the File tab.  Click on E-file and Continue.  On the next screen change the federal to Do not e-file, the state return will show E-file my state return now.

Thanks, it is working!  It shows my federal already accepted, so it automatically direct me to state e-file only. 

Also you might need to update your return with the federal efile status.  which you should do anyway.  Then save your return,

For the Desktop program you have to check the filing status inside the program.  Open your return and go up to menu item 

File > Electronic Filing > Check Electronic Filing Status