The 2021 LM-2 financial reports for union locals, joint councils and the International are due by March 31, and are accessible at this US Department of Labor website. You can access a local union by putting “IBT” in the Abbreviation box, and then the local union number in the “designation number” box.
For the International Union report, you can use the abbreviation “IBT” and then choose “National Headquarters” from the menu under designation name. The International filed the IBT 2021 report on March 21.