How come items I place with a particular TAG do not show up in that line itme in the TAG Report?

I can help you isolate the error you're having when generating the Tag Totals report, @donna-donna-post.

First, try to check the filters that you set on that Tag Totals report. Make sure to select either Personal, Business, or All from the All drop-down and also the date.

You can check the screenshot below for your reference:

Here's more information about manually adding transactions in QuickBooks Self-Employed and the Schedule C and expense categories in QuickBooks Self-Employed.

See this QuickBooks Self-Employed Overview for more information on how QuickBooks tracks everything throughout the year.

I'm always here if you need more help generating the reports that you need. Take care and have a great rest of the day!