What if I already use a tracking template on the account level?

Tapper replaces your Google Ads account-level tracking template with its own, keeps a copy of yours, and puts it back when you disconnect the account. If your template passes custom or Google Ads parameters to the final URL, move them to the Final URL suffix field instead of adding them to Tapper's template.

Steps: How to fix lower level tracking, or Google's Add a Final URL suffix.