LITERALLY SO EASY TO FIX!!! I was pulling on the cartridge/carriage over a period of 2 days and it wasn't moving. I put a lot of force on the carriage. I did't want to rip the thing out and break it. I put the wrong type of ink cartridge in and then it got stuck on the right side of the printer.
TO FIX: Take out any paper in the paper tray and then pull the paper tray out completely. Or I guess you could leave the paper and pull the paper tray out. Then open the access door and pull the carriage to the left again. It moves easily to the right. DONE. I should have tried that yesterday...