Is your Brother printer showing an “Offline” message when you print? Don’t you know the way to bring it back in online mode? If really not, no need to panic! Here is the exact possible guideline for the same:
• Give a right-click the icon for your Brother printer

• Now, tap “See what’s printing”

• Then, go to “Printer” option and remove the check-mark to the option “Use Printer Offline”
In case, Use Printer Offline is greyed out, click “Open As Administrator”. Enter your administrator password, and then click “Yes” button. After doing such thing in an appropriate way, Brother Printer Offline Fix completely in a short span and then you can frequently print any document or images from your Brother printer.
https://www.printersupportpro.us/brother-printer-offline