1. Open Recurring Transactions. Click the gear icon, then Recurring Transactions under Lists, or search "recurring" in the top search bar.
2. Start a new template. Click New, then choose the transaction type you're templating, invoice, bill, expense, journal entry, or any of the others the feature supports.
3. Name it and pick a template type. Give it a name you'll recognize later, then choose Scheduled (creates, and can send, automatically on the interval you set), Reminder (QuickBooks reminds you it's due, you approve and create each one yourself), or Unscheduled (a saved template you reuse on demand, with no schedule attached at all).
4. Fill in the details and set the schedule. Add the customer or vendor, line items, and amounts the same way you would on a one-off transaction, then set the interval, weekly, monthly, and a start date. Add an end date or a number of occurrences if it shouldn't run forever.
5. Save it, and check in on the list occasionally. A Scheduled template runs without anyone opening QuickBooks, which is the point, but it's worth reviewing the Recurring Transactions list every so often to confirm each one still matches reality.