To save your Tenancy Statement(s) as a PDF document, you will need to install 'Microsoft Print to PDF' as a device on your PC. 

Instructions on how to do this are found in this link:

Once you have added the Microsoft PDF to Print to your devices, you will be able to select it from your list of devices when you print a Statement:

If you require further assistance with 'Microsoft PDF to Print', please speak to your IT team.