Where do I find the tag ID?

On the My tags page, click the icon next to the tag.

Go to the Setting section. The tag ID is specified in the Tag ID field.

Choose the resource and go to the Administrator section.

In the Properties section, go to Property Settings. The tag ID is specified in the Tracking ID field.

Select a tag from the My tags menu.

Go to Tag settings → Information. The tag ID is shown in the ID field.

Go to My sites.

Next to a site, click and select Tag settings in the menu that appears. The ID is shown under Tag code.