Schedule C, Line 25 has data that cannot be edited or deleted, and the right click for "Data Source" is greyed out. Where does the data flow from so that I can edit this?

Line 25 on Schedule C is for Utilities, like a separate telephone line.  In my return, there is an amount pre-filled and I cannot change or delete it, nor can I determine where it came from.  It was not an imported amount from Quicken, and it did not transfer from last year's return.  The right-click menu option for "Data Source" is greyed out.  I need to edit this amount, and there is no way to do so.

**SOLVED**

TurboTax has created a form that I had not seen before, it is called "Schedule C Worksheet."  Apparently this is where imported data goes, and the information form this worksheet flows to Schedule C.  If you don't import from Quicken, then this form will not be used.  However, TurboTax does not provide a "Data Source" link, nor does the Worksheet appear in your list of forms in use.  This lack of cross-references is a bug that TurboTax needs to fix.

Thanks to TurboTaxDawnC's post https://ttlc.intuit.com/replies/6596496 which provided the solution here.