Create a flow based on a new Sharepoint tasks list

You need to use the list ID in this case, name will not work, least did not for me.

To get the ID, there are a few ways.

1. Go to list settings, in the url you will see something like /_layouts/15/listedit.aspx?List=%7Baa956c68-0b02-462b-9d7a-931a9819aac0%7D.  You can extract the ID by removing the %7B at the beginning and removing the %7D at the end, leaving you with aa956c68-0b02-462b-9d7a-931a9819aac0, which is the list ID in this example.

2. You can also go to list settings, then form settings and the list ID is more apparent.  From here you will see something like /_layouts/15/FormSettings.aspx?List={aa956c68-0b02-462b-9d7a-931a9819aac0}&Source..., where the list ID is in the brackets.

3. You can also use PowerShell or just create a flow from the list that starts when you add an item, once you open the flow you will see the list ID is populated for you, then you can just copy and paste it into your other flow.