Turn off auto-hyperlinking in Notes app for macOS

Here is the solution:

1. Open your note.
2. Go to Edit then Substitutions and uncheck Smart Links

It will resolve your open query.

Also, uncheck Smart Copy/Paste to be more precise and if necessary.

For an "at the end of the task" solution, you can Select All, Go to Format menu, font item and choose "Remove Style". You can also bind a shortcut for the same in System Preferences → Keyboard → Shortcuts, under Application shortcuts tab.

Another slightly clumsy approach is to select the link and copy-paste it without style.

• How to force OS X Notes application to lose formatting when I paste text from clipboard?