If you find that you Brother Printer cannot detect the ink cartridge you can follow the steps given below to the cartridge and try and solve the problem:

Step 1: Turn the printer off, wait for a few minutes, then turn it back on
Step 2: Lift the printer lever on the left and open the cover
Step 3: Press the “Cancel” and “Print” buttons simultaneously
Step 4: Tap the “+” button and scroll down to the ink cartridge you want to reset, then press ‘Ok.’
If your Brother Printer does not detect the cartridge even after you reset it, you can call the Brother printer support and speak to a printer expert to troubleshoot the problem.