Hello,
After being sure that the score is not on the site ...
Click on the tab : Scores
Then click on : Add a score
To artist : Look carefully if it does not exist in the database, often yes, just try by entering the last name and choose the proposal that suits you.
Then: Indicate the title
Click on send, and at the very bottom / Click on : No it is not there
Then choose the file to share, and then click on send
Logically, it's done ♫♫
Thanks in advance to you