Download the Wireless Device Setup Wizard for your computer at the Brother Solutions Center.
Install it and run the Wireless Device Setup Wizard for your printer.
Plug the USB cable that came with your printer and click Next on this screen:
3. Check the Checked and Confirmed box on this screen and click Next
4. Select your wifi network name on this screen and click Next
5. Enter and confirm your wifi password/network key on this screen and click Next
6. Once your settings have been submitted to the printer, unplug the USB cable and click Finish on this screen
7. Your label printer is now set up!