If you do not have a completed account from login.gov or ID.me, sign up for login.gov (much easier and private than the other, “much” is a huge understatement!).
Use an authentication app if you can (they support almost all of them including Micrsoft) OR text or call for 2FA and download codes as your two factor authentication.
Once you have a working login go here and create an e-Postcard Profile. Once you complete the profile you can use the Manage Form 990-N Submissions sections. Once it is submitted make sure to “print” a PDF file and save it with your club documents.
Wait a bit (the IRS says 7 minutes!) and make sure it is accepted. Details on page 6 of the instructions.