Hi info@bottomlinetaxservices.com,
In addition to my original response, within that same window, if you select the "Appoinments" tab, please make sure that in the "Synchronize the following activiy types" dropdown selection, that the "Activity Types" from Method that you want to synchronize has a checkmark in either the (Select All) option which will choose all of the activity types or each individual activity type in the list.
I hope that this helps.
Ronen