Can't view data in saved form fields
I have .pdf tax forms I have to complete for Colorado every month. https://www.colorado.gov/pacific/sites/default/files/DR1777_2015.pdf. I save the completed forms and have tried to create a partially filled template to save the data in the fields that don't change each time the report is filed. I save the form using: File - Save As - Reader Extended pdf - Enable Additional Features in Adobe Acrobat X Pro. I can then look at the partially compelted form in Windows 10 file explorer and see the data that I saved, but if I open the saved form in Adobe Acrobat X Pro again, the fields are all blank. If I open any of the fully completed copies of the form in acrobat that I've saved over the last three years, the fields are all blank even though I see the data in windows file explorer preview. I have spent hours searching for a solution. Any help is most appreciated.