The Tavern

I've created a new local branch. But I don't know how to upload this into a remote storage. I've pressed the publish button, but only the following message appears.
Please help me.

You can't modify the offical repository. You need to fork the repository on Github. This will create your own copy of the repository. Then you can "sync" (push changes) to it.

Thank you answer!

I don't want to make a new fork.
All I want is a pull requests to origin.

EDIT: It's settled.