Comment 31 for bug 1306849

Add this (one) line to /etc/apt/sources.list

deb http://www.openprinting.org/download/printdriver/debian lsb3.2 main main-nonfree contrib # OpenPrinting https://openprinting.org/drivers

then, do
  sudo apt-get update
  sudo apt-get upgrade
  sudo apt-get install openprinting-ppds-postscript-brother
and go to
  http://localhost:631/printers/
to configure your printer

Does that answer your quest? Can the status of Incomplete get changed to Valid for this issue?