Just so you know why the Tax Summary report is not date sensitive is that the amounts are stored in the data as summary amounts only, since the last time the report was cleared. It's not just a matter of modifying a report, it's changing the whole tax data structure - which isn't a small matter.

You could create a custom report based on the Tax Tracking data file, which does store the individual tax amounts by group. This would allow you to report on say a summary tax amount for all tax within a desired date range, for each tax group or only particular groups. This would be a pretty straight-forward workspace that could be created using Adagio GridView.