If you don’t see your account type, click Add Other Account, then select the account.
Enter your account information and sign in.
Make sure the Notes checkbox is selected for the account.
Each account you add is listed separately in the sidebar.
Be sure to set up your iPhone, iPad, and iPod touch to use the same notes accounts, so that your notes stay up to date across all your Apple devices. See the “Set up and get started” section of the user guide for Apple Support Manuals website.
In the Notes app iCloud.com or Yahoo) and any other devices you had already set up.
Tip: If you Apple Support article: Use Notes on your iPhone, iPad, and iPod touch