If your printed page has been cut off at the top, side, or bottom - your printer may not be able to 'print to edge'.
Most modern printers print to the edge, but some models do not. Your printer may also have the option, it might just need to be ticked. Try googling the brand and model of your printer along with the keywords "print to edge setting".
If your printer doesn't have the 'print to edge' function, you can always take the document to your local print shop.
Examples of a printer not being able to 'print to edge':