Sorry to inform that your model Deskjet 845C has reached the end of support life, meaning the HPLIP solution is considered “As-is”. No further HPLIP code changes will be implemented by HP.
However you can send me your PPD file from /etc/cups/ppd for further analysis, but we can't guarantee that we can help you fully as this product has reached end of life.
Sorry to inform that your model Deskjet 845C has reached the end of support life, meaning the HPLIP solution is considered “As-is”. No further HPLIP code changes will be implemented by HP.
However you can send me your PPD file from /etc/cups/ppd for further analysis, but we can't guarantee that we can help you fully as this product has reached end of life.