hp LaserJet 1012 and Big Sur

DKHuffer's post worked for me!

I :

• Turned off HP 1012
• Went to https://sourceforge.net/projects/gimp-print/files/gutenprint-5.3/5.3.3/ to download gutenprint-5.3.3_rev.dmg
• Installed the software (after the package opens, it displays as gutenprint-5.3.3.pkg, but click on that icon and click Command-I and the info window will show it the installer for gutenprint-5.3.3_rev-2.dmg )
• Turned HP 1012 back on
• Went to System Preferences ... | Printer & Scanners | Clicked on HP LaserJet 1012 | Clicked on — sign below it to remove it from Printer & Scanners
• In that same window, with HP LaserJet 1012 icon still selected, click + sign to re-add the HP 1012
• It should show that Gutenprint 5.3.3 will be used as the printer driver

Then I printed a test page and it worked instantly!

Thanks to LL Cool Jay for originally identifying guntenprint-5.3.3_rev-2.dmg as the proper printer driver and to DKHuffer for posting about turning printer off, reloading 5.3.3_rev.dmg, turning printer back on and getting my much-loved HP 1012 working again!