Using the 2016 Premier desktop edition, the Schedule C Part 1, Line 1a is editable and right clicking on that line or any other line on the schedule gives the Menu/Window for Data Source, Add Supporting Details, etc. Note - There is no Data Source for Line 1a as that is a direct user input, either from the step-by-step interview or directly on the schedule itself.
My TurboTax software is installed on a Windows 10 PC with all the latest windows updates and all the TurboTax latest releases.
Suggest you check to make sure that you have the latest TurboTax releases. Click on Online at the top of the desktop program screen, then Check for Updates. Also, if you have not restarted your PC after installing the TurboTax software and updates, go ahead and restart. See if this corrects your problem. If not, uninstall and re-install the software. Restart the PC again and see if that corrects the problem.
If not, then contact TurboTax support for assistance. Support is closed on the weekends after tax season.
See this TurboTax support FAQ for a contact link and hours of operation - <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number">https://ttlc.intuit.com...>
