Investors & landlords

I pulled up the worksheet that TurboTax had initially created (1040-X) after I selected "Amend" this return.  I did not enter any changes.  Refund amount should have started at $0.  Mine started at $484.  This is why (screen shot).  But the question is WHY?  NOTHING yet has been entered for the Amended Return.TT Screen Shot II.jpg