Is it possible to move the "Invoice to" box to enable the Invoice to fit a window face envelope?

Thanks for posting here, userkellgin.

We can move the INVOICE TO section by changing the template. Here's how:

1. From the Gear icon, select Custom Form Styles.
2. Find the invoice form style you're using and click Edit.
3. On the Design tab, tap the Change up the template. Choose what's works for you.

4. Click Done to save it.

We can also adjust the page margins. On the Design tab, click the Edit print settings.

In addition, QuickBooks Online has an option to set the invoice template to a window envelope. From the Edit print settings section, check the Fit printed form with pay slip in window envelope box. Tap Done to save it.

For your reference, here's how to customise invoices, quotes, and sales receipts in QuickBooks Online.

Keep on posting here if you need anything else. Stay safe!