Here is a quick guide on how you can create a recurring schedule for an invoice that you have already made. Follow the steps below.
Step 1: On your dashboard click sales > create invoice
Step 2: On the right side of your invoice page, select the option Recurring/automation settings and change invoice type from Manually to Automatically. Now, select the invoice cycle type ( weekly, monthly, quarterly or yearly) and select the schedules date.
Don't forget to save the invoice
You can easily check Recurring invoices from your previous invoices.