Thanks for bringing this up in the Community space, ropemckenna.
Currently, QuickBooks Online doesn't provide a direct way to include the net total for each invoice when pulling down a report using a specific tag.
However, you can export the reports to Excel and perform manual calculations to determine the net total for each invoice.
Additionally, you can customize your reports and save them with their current customization settings through memorizing. For more details, refer to this article: Memorize reports in QuickBooks Online.
Should you have any other concerns besides including the net total for each invoice when opening reports, feel free to leave a reply. We're always eager to help.
