what happened to tags in quickbooks online?

The Tags feature is already sunsetting in QuickBooks Online (QBO), and will be migrated to Custom fields, @Luke250.

Although Tags feature is no longer available, existing users like you can still run reports on them.

For guidance on migrating your tags to Custom fields, you may find this article helpful: Overview of custom fields capabilities in QBO.

If you have any further questions with tags or anything else related to QuickBooks, feel free to reach out anytime in the Community.