United States
California
The California Supreme Court has ruled that the "Taxpayer Protection Act" must be removed from the ballot, as it would be a revision to California's Constitution. This would require an amendment, rather than an initiative.
https://lao.ca.gov/BallotAnalysis/Initiative/2021-042
Africa
Kenya
Passage of the 2024 Finance Bill has resulted in protest that turned violent, with several protesters killed and injured by the police.
https://www.voanews.com/a/several-shot-protesters-storm-kenya-s-parliament-after-lawmakers-approve-tax-hikes/7674258.html
Europe
Denmark
Starting in 2030, in Denmark, cows and pigs will be taxed for their contribution to producing greenhouse gases.
https://learningenglish.voanews.com/a/cows-pigs-face-carbon-tax-in-denmark/7674742.html