Acrobat Reader is required to read and edit "fillable" PDF forms that are issued from Province.
It is a downloadable program that is FREE.
It can be set as the "Default" programme to edit PDF files, that is, if you double click on a PDF file, Acrobat Reader will open the file.
NOTE, the words "Double Click on a file". If you open a downloaded file with the browser, the file will not open with Acrobat Reader.
Acrobat Reader can be downloaded from the Acrobat web site, be careful not to download it from other "helpful" web sites
Download it from this site https://get.adobe.com/uk/reader/
YOU MIGHT want to UNTICK those three boxes
Save the file, perhaps to the Download folder, not that it is important because you will be "running" the file from wherever it goes
Run the file
Set the Acrobat Reader as your "default" PDF Application / Reader