Know what specific type of ink you want. They are all labeled. Go to the ink area of the store that meets your requirements. Take the package to the cashier. They will usually ask for a credit card for payment. Process completed.
HP ink cartridges slip right into the unit and the system aligned the cartridge with no issues. Only downside is this model cartridge sure didn’t last long and like all HP cartridges it was ridiculously expensive. I honestly don’t know why I keep buying their products.