Not all printers are able to use MICR ink, but many popular models from major manufacturers such as HP, Canon, and Epson do have this capability. In order to print checks or other documents with MICR encoding, you will need to purchase special MICR toner cartridges for your printer. These cartridges can be found through online retailers or at office supply stores. Once you have installed the correct cartridge, simply follow your printer's instructions for printing MICR-encoded documents.