There are 2 main methods in which to find the ink/toner that you need for your printer
Method 1 (the long way):
Click on your brand, such as:
Now you will have to search through all Brother printer models or cartridge models to find your specific model:
Method 2 (the short way):
Use the search box and type in your printer model or cartridge model:
This will find your specific model without having to search through all printer/cartridge models.