If your Brother printer is showing offline, it often indicates a communication issue between the printer and your computer or network. Start by ensuring the printer is turned on and connected to the same network as your computer. Check the printer's display for any error messages or notifications. Make sure that the printer is set as the default printer in your computer's settings. Restart both the printer and your computer to refresh the connection. Additionally, check if there are any pending print jobs that might be causing a blockage. If the problem persists, reinstalling the printer drivers or updating them may resolve the issue. In some cases, checking for any firmware updates for the printer can also help restore connectivity.