Hi @wgray1,
You can enable the service date option in Customization settings to easily add or edit it on invoices.
Here's how:
- Go to +Create then Invoice.
- In the upper right, click Manage.
- Select Customization.
- Turn on the Service date.
You can also refer to this article to know more about customizing sales forms in QBO: Customise invoices, quotes, and sales receipts in QuickBooks Online.
If you have any further questions, don't hesitate to reply.