TeX Live is only possible due to the efforts of volunteers worldwide; we welcome all newcomers.
One way that anyone can contribute to TeX Live is to email bug reports or enhancement requests to the firstname.lastname@example.org mailing list. Please check the known bugs page first, and ideally search the mailing list archives.
If you're having problems with a particular program or package, as opposed to the TeX Live infrastructure, then please send the report to the maintainers of that program. In general, TeX Live just copies whatever is distributed from CTAN, and we will not install changes that are not uploaded to CTAN first.
If you are willing to help test TeX Live, please download the current (or test) images and send reports on whatever discrepancies you find. We can always use more testers, on any platform.
If you would like to help with the documentation please see the documentation page, and email the doc-specific list, email@example.com (archive). Additional translations of the TeX Live guide, and translations of the install-tl/tlmgr messages are always appreciated (again, info on the doc page).
Another longstanding task where volunteers are needed is to write and update man pages. Not all the programs in TeX Live have man pages, but they should (compare binaries to man pages). At least as importantly, many of the man pages, especially the ones for the TeX engines and other core programs, are out of date, having been written many years ago; command-line options, features, and most of all references to web pages for more information all badly need to be added or updated.
If you would like your package or software to be included in TeX Live, please read the advice, requests, and requirements for contributing packages.
If you would like to contribute to TeX Live infrastructure development, including updating packages, building binaries for other platforms, or anything else (especially on Windows), please see the public source repository, TL build information, and otherwise browse around.
For questions, suggestions, or any discussion, please email the general list, firstname.lastname@example.org (archive). Anyone is welcome to join the mailing list and/or participate in the discussion (it is not necessary to subscribe to post), regardless of their level of involvement.
If you are able to contribute financially, we ask that you join and support your local TeX user group, and/or make a donation to one of the TeX project funds.
You may also wish to review this list of general tasks in the TeX community, not specific to TeX Live.
Thanks for any and all contributions!