Is your Brother printer showing offline albeit it's connected properly? You’ll bring it back by simply removing these printing jobs then plan to print again. First of all, you'd wish to right click on the icon of the brother printer then select ‘see what’s printing.
After that, you need to select ‘Cancel all documents’ and if you're unable to select it then you'll open as an admin to repair it. Enter your admin password then enter then you will be able to cancel the printing jobs. Once you're doing it, plan to print to determine if the brother printer remains showing offline or not.