Turn off the printer and open the top. You should be able to see the printhead assembly. Look for a small plastic lever, which will pop up when the printer isn’t printing, to the left of the assembly. Move it forward and down to release the printhead, then push the assembly to the right. It may only move an inch or less at first, but when you push it to a stop, it will click. This fully releases the assembly so you can push it to the side. If there is no lever next to your printhead assembly, print a page with the top up and unplug the printer with the assembly in the center, unlocked. This will resolve the Epson printer not printing problem.