When I try to print the message I get "The type of print head is incorrect. Install the correct print head." I have had the printer for some time and have never had a problem before.

Sometimes such errors can pop up when there are errors in the driver software so in most cases the printer driver software can have errors while being in use or is shut down. So to reset remove your printer from the PC and uninstall the printer software. Now reinstall the printer software and then connect the Printer to be detected as a new hardware as it will be installed. Now check the printer properties to see the ink levels.
Activate head cleaning before a test is taken . Sometimes it is possible that the head is not reacting to the need of the PC command or can be an issue with ink drying or poor ink cartridge contacts.