GNU/Linux Mint 20.x Add Printer Guide
You are Welcome! The Tutorial Shows You Step-by-Step How to Add Printer in Linux Mint 20.x Ulyana/Ulyssa Mate/Cinnamon/Xfce GNU/Linux Desktops.
And to Successfully Add Printer in Mint 20 Desktop you have First, to Download and Install the Printer Driver.
So this Guide includes detailed Instructions about How to Download and Setup Printer Driver for Linux.
Especially Relevant: for HP Printers follow instead this other Guide.