;;(setq org-caldav-select-tags `("cal_test" "second_tag"))              ;; mapped directly to org-export-select-tags
(setq org-caldav-debug-level 2)
(setq debug-on-error t)
(setq org-icalendar-use-deadline '(event-if-todo))            ;; see docstring
(setq org-icalendar-use-scheduled '(event-if-todo event-if-not-todo))            ;; see docstring
;; after this try applying tags for specific calendars
(setq org-caldav-calendars '((:calendar-id "new-bills"
			      :select-tags "cal_new_bills")
			     (:calendar-id "new-fam"
			      :select-tags "cal_new_fam")))