Hi there, @Alex-Henderson.
It's my pleasure to answer your first post in the community. At this time, the option to leave a spacing or add blank lines on invoices/estimates are not available.
I can see how relevant to have the ability to add lines when creating invoices and estimates. Your ideas will help us improve our products and services. For now, you can follow our Firm of the Future webpage to receive future QuickBooks product updates.
For future reference, you'll want to personalize your sales forms and add relevant info that matters most to your business. Read through this article for the step-by-step guide on how to create and upload your templates: Customize invoices, estimates, and sales receipts in QuickBooks Online.
You're always welcome to leave a comment below if you have other concerns, @Alex-Henderson. I'm just around to help.
