If you are unable to download P60, CT100 or VAT forms from the HMRC website, you may need to check that Adobe Reader is working correctly. Often, an issue with the installation will mean the PDF file from the HMRC site will not open automatically. The error message will then appear - "this file could not be downloaded".
Here is how to fix the problem:
Close Internet Explorer, and then Open Adobe Reader.
You may need to also repair the Adobe Reader installation:
Once you have followed the repair instructions, you may need to restart your computer.
Finally, if this still does not work(!) you can try to upgrade your version of Adobe Reader here. You could also try a different internet browser like Mozilla Firefox or Google Chrome - either of these should work straight away.