I have moved and changed my address details. But my old address still appears on my new invoices. How do I change it?

Welcome aboard to the Community, @daylenmorbey.

Let me provide some clarifications about creating invoices in QuickBooks Online.

The address that will reflect on your invoices will depend on the information entered from your sales form template. I suggest updating the details and set it as default for the transactions.

Here's how:

1. Click the Gear icon and select Custom form styles.
2. Search for the template, then choose Edit.
3. Go to the Content tab. 
4. Press the pencil icon in the upper-right corner. 
5. Change the address. 
6. Hit Done. 
7. Click the drop-down next to Edit.
8. Select Make default. 

Meanwhile, I've attached some articles you can use to customize an invoice, as well as how you can upload your own template:

• Customise invoices, estimates, and sales receipts in QuickBooks Online
• Uploading invoice template to QuickBooks

I'm only a few clicks away if you have any other questions. Wishing you and your business continued success.