Install Network Printer Manually (Router : TP-Link TL-WR842ND)

I understand from the screenshot of your router, 192,168.0.1 is your router's address, and you have a separate "printer server" box (TP-PS110U)connected to the router by ethernet on one side and your printer's USB on the other side.

Step 1 says to go directly to step 4... However, step 3 explains the printer spooler web interface at http://192.168.0.10/ -- it may be worth a visit there to check everything is in place.

According to Step 6, the spooler is at 192.168.1.10 by default (to confirm with the information found on the web interface of the print server at http://192.168.0.10), that's where you should find your printer, not at 192.168.0.1, which is your router.

Does it change something?