To open the cash drawer automatically for Epson TM-T88IV
On your Windows PC, search for Printers and Scanners.
Windows Settings page opens and displays a list of all the added printers.
Right-click on Epson TM-T88IV to reveal the context menu.
Select Printing preferences.
The Printing Preferences open.
Under Document Settings, select Cash Drawer.
Additional settings appear and you will see all the available cash drawers.
For each of the cash drawers, from the drop-down list, select Open after printing.
Your settings should look like this:
Click Apply and click OK.
This ensures that your cash drawer opens every time after the Epson TM-T88IV prints the receipt.