brother has a nice little note on this printer that says "upgrading to windows 10 may make some features of the printer driver not work"
now you have to uninstall all the brother software as on this page
which shows windows 8 because they wanted you to do it before you upgraded
but if you cant find it they should be in the start menu all programs under brother or the control panel add remove programs
then remove the printer from the printers folder
then download and run the windows 10 version of the brother software from this link
and run that to re install the printer