If your Epson printer says offline then it is because of a communication error between the laptop/computer and the printer. You will not be able to print till you get your printer back online.
To fix the Why does my Epson printer say offline, you are required to set the Epson printer as default. In order to do it, navigate to the control panel and then click on devices and printers. You will see the Epson printer there, right click on the icon and then select ‘see what’s printing’.
Go to the toolbar and then click on the printer and see whether ‘use printer offline’ has a check mark next to it or not. If you see a tick mark then disable it which will get your printer in the online state and you will be able to print again.