Tap 
on the home screen and select Consumables/Others to display the approximate remaining ink levels and the approximate service life of the maintenance box.
You can also check the approximate ink levels and the approximate service life of the maintenance box from the status monitor on the printer driver.
Windows
Click EPSON Status Monitor 3 on the Maintenance tab.
If EPSON Status Monitor 3 is disabled, you need to install EPSON Status Monitor 3.
Mac OS
Apple menu > System Preferences (or System Settings) > Printers & Scanners (or Print & Scan, Print & Fax) > Epson(XXXX) > Options & Supplies > Utility > Open Printer Utility > EPSON Status Monitor
You can continue printing while the ink low message is displayed. Replace the ink cartridges when required.