A driver is simply the translator between your computer and your printer. Without the right one, your computer doesn't know how to send the document, and your printer doesn't know how to print it.
Look at the front or top of your printer for the model number (e.g., "HP LaserJet M110we" or "Epson EcoTank ET-2850"). install driver for printer
How to Install a Driver for Any Printer (Windows & Mac) A driver is simply the translator between your