I too experienced the "Hdeduc is marked as estimated" error on the Sch A Line 1 worksheet. Early in my tax data input effort I flagged some of these data as estimated. Once I input the correct data I reset the estimated flag. Evidently once the estimated flag is set on this worksheet the code is buggy such that you can't reset it. I went into form mode, selected the worksheet, and selected print preview to view the data. Once I could see the print preview as a pdf, I deleted the worksheet. Then I opened the Sch A form, clicked on line 1 and then re-entered the data using the data shown in the pdf. Here we are, deep into the 21st century, and Intuit can't (more likely won't spend the money to) fix this systemic error. Sad to see Intuit has grown too big to concern themselves with such a "minor" feature to them but a PITA for their customers. Note: I've been using tax software since SoftView's Macintax on an SE30. Never seen a company not own up to and then fix their buggy code.
