Internet Explorer was not able to open this Internet site can happen when you try and download a PDF from a HMRC website. It seems to be caused becaus ethe PDF needs to be encrypted.

If you use Microsoft Internet Explorer you may need to adjust your settings to successfully download the software.

In Internet Explorer for Windows:

(1) go to Tools - Internet Options

(2) Advanced tab

(3) under Security, ensure the ‘Do not save encrypted pages to disk’ is checked

(4) click Ok