How to create a holdback on an estimate then create it on a reoccurring invoice?

Hello there, @domenicattisano.

Let's set up a new service item to create a holdback on an estimate, then create a recurring invoice on it.

To get started, let's go to the Product and Services page to create a new service item. Here's how:

1. Click the Gear icon.
2. Select Products and Services.
3. Click New, then select Service.
4. Enter the Service Name. (Example: Holdback)
5. In the Income account section, select a liability or asset account instead of the income account. 
6. Hit Save and close.

Once done, you can now create an estimate using the service you created. Here's an article for your reference: Set up and Use Estimates and Quotes.

Also, I want to let you know that QuickBooks only allows you to convert an estimate to an invoice.

I'm taking note of your concern regarding converting an estimate to recurring invoices. 

In case you need tips and related articles in the future, visit our QuickBooks Community help website for reference: QBO Self-help.

You can always get back to me if you have any other questions. It'll be my pleasure to help you.