MNE-Python is maintained by a community of scientists and research labs, and accepts contributions in the form of bug reports, fixes, feature additions, and documentation improvements (even just typo corrections). The best way to start contributing is by opening an issue on our GitHub page to tell us about errors you are encountering or to discuss your ideas for changes. For general troubleshooting, you can also write to the MNE mailing list or chat with developers on the MNE gitter channel.
Changes are typically made by forking the MNE-Python repository, making changes to your fork (usually by cloning it to your personal computer, making the changes, and then pushing the local changes up to your fork), and finally creating a pull request to incorporate your changes back into the shared "upstream" version of the codebase. The contributing guide has more details on how best to configure your workflow for a smooth experience contributing to MNE-Python.
Users and contributors to MNE-Python are expected to follow our code of conduct.