There are some methods that you can try to solve your Brother printer offline problem:
– Verify the Brother Printer turned ON and there are no errors on the screen.
– Make sure the Brother printer connected to the computer properly.
– Make sure your Brother Printer set as the default printer in Windows 10 settings.
– Delete all print jobs from the printer properties option.
– If you see a copy of your Brother printer’s icon (example:- Brother XXX-XXXX (Copy 1)) then delete that device from the computer
Regards,
Peter