Did you lock the 2018 return? Does the two year comparison match the actual return that was filed? Look at the General Information created in the 2018 return and at the worksheet created in the 2019 return. You can create the worksheet, if you don't see one by entering a 2 = with worksheets in the first item after Refunds Taxable in 2019 Worksheet.  Possibly the new $10K haircut on taxes played a role.