I posted a few weeks ago but still can't fix. PSE 2020 on Win 10: I have two printers 1) a Canon TS8220 for photo printing and 2) a Brother laser printer for documents. When I send a photo print job to the Canon, it prints on the other printer. Sending other jobs (e.g., Word) to the Canon print correctly. I uninstalled and reinstalled PSE and did the same with the Canon printer. Drivers are up to date. Didn't fix. Suggestions?
Try resetting the preferences file. Go to Edit>Preferences>General tab and click the Reset Preferences on next launch button. If that doesn't fix it, reinstall the printer driver from Canon. Don't rely on the one installed by Windows.
If that doesn't fix it, give us a screenshot of your printer dialog.
Added: You appear to have had the same problem a few years ago. Essentially, the same solutions were offered you back then and worked.
I didn't remember from four years agou. Now new PSE version and new Canon printer. .
But your suggestion worked this year. Most appreciated.