I need to know exactly when I started filing either Sales Tax and/or Sales and Use Tax for a particular jurisdiction
In the admin console go to the Tax Returns tab
Under that tab click on filing calendars
Then click on the plus sign beside Active Filing Calendar
Put a checkmark in the box next to Display Expired Filing Calendars
That will display all of your filing calendars- both current and expired- including the effective dates for each calendar so you can see when filing began.