It is quite easy to fill in PDF forms. In Windows, you can use Adobe’s Acrobat DC application. Mac users will find a Mac version of the Acrobat application. Other Fill & Sign applications are available.

• Download a free version of Acrobat DC and install it.
• Open the PDF file with Acrobat DC
• Using the Tools menu, select Fill & Sign
• You can select the various fields you wish to fill – move the cursor to the field
• Fill the fields you wish to fill using the text tool from the toolbar (marked Ab)
• To sign using the Sign Yourself from the toolbar
• On completion, save and print the PDF form
• E-mail the completed PDF form back to the sender, if required

Adobe has a Fill and Sign application for Android and Apple tablets and iPhones.