Norton doesn't release major version by year anymore, they release improvements with v22.x.x since end of october 2015. Maybe you can expect a major version v23...
Anyway, the latest beta last year was for the v22.7
Actually they have a "early adopter program" where you can test the next improvements in norton, since the new version was released some days ago, the program is actually in "pause". more info: Norton EAP | Norton Community