How does the project plan to keep up with that? Will it require volunteers?
Right now, we're focusing on tooling to make onboarding new tax forms simpler and require a lower threshold of project understanding to allow a larger, less technical group of people to contribute
If you have questions and the README and CONTRIBUTING documents do not specify a way to communicate, then open Issues on GitHub with your questions. Try to avoid asking questions unless you’ve read everything and cannot figure out how to proceed: remember that everyone working on the project is volunteering their limited time, just like you, and try to be respectful of their time and energy.
I am unaffiliated with this project, this is just the general procedure for contributing to open source projects.
IME everything else stays the same (e.g. the 8000s forms), but there are so many of them that it's a lot of work to just see which ones have changed and if you have to care about them. The forms also become less formulaic. E.g. If you file 6251, you need to keep your own records about Alternative basis, so you can't just fill them out based on w2s and 1099s.