After upgrading to Mac OS 10.15 Catalina, trying to print with a Dell Color Laser 1320c leads to the error message: Filter failed (German: Filter fehlgeschlagen).
This fixes the "Filter failed" (German: "Filter fehlgeschlagen") error with Dell Color Laser 1320c printers under Mac OS 10.15 Catalina by leveraging the Fuji Xerox C525A printer driver which is similar to the native Dell driver.
User steveham modified the original driver so it could install on all macOS versions greater than 10.7. Download the modified driver here: https://www.dropbox.com/s/aotekhnsj7ox7e4/Fuji%20Xerox%20Print%20Plug-in%20Installer%20Modified.pkg?dl=0
Install the .pkg file
Go to System Preferences - Printers & Scanners
Click on the + sign to add a printer
Connect your Dell 1320c printer via USB and turn it on. It should soon appear in the list as a USB printer. Select it.
Finally you need to change the default printer settings to always print from the tray. We do this from the CUPS Web Interface. Open a web browser and go to http://localhost:631/printers/. If you get a screen saying Web Interface is Disabled, open a Terminal window and run "cupsctl WebInterface=yes".
(Optional) Change other settings in the other tabs. For example, in the General tab you may want to turn Collated on and change the Media Size to be the paper size you will normally be printing with.
Click Set Default Options to save these settings for your printer. Enter your username and password when requested.
I can confirm the solution given by alsdkjasdlkja works. I only have 1 addition. I first tried to change the driver of my already installed Dell Color Laser 1320c instead of removing it and reinstalling it. This didn't work. I couldn't select a paper tray when trying to print something.
When I deleted the old printer and reinstalled it with the FX driver, everything worked just fine.