Log in to Zapier and click Create Zap.
Choose the trigger β either an event in Quickbooks, or a completed Retell call, depending on which side starts the flow.
Add the other app as the action step.
Connect your Retell account by pasting your API key from the Retell dashboard, and connect your Quickbooks account.
Map the fields: phone number and agent for a call, or call summary, disposition and transcript for a write-back.
Test the Zap and switch it on.
Invoice goes 30 days overdue β Zapier triggers a Retell collection call β promise-to-pay date written back












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