There are several ways to give back:
Got an idea or a problem you're trying to solve? Go ahead and submit one: https://github.com/mglaman/drupal-check/issues
Want to write code or help troubleshoot? See what you can help with in the issue queue, and if you have a solution feel free to submit a PR with the issue number referenced in the description.
Want to help the community get ready for Drupal 9? Check out our instructions on the wiki: https://github.com/mglaman/drupal-check/wiki/Drupal-9-Readiness
Please follow the Drupal Code of Conduct: https://www.drupal.org/dcoc.