How can I make the invoice fit a #9 double window envelope?

I'd be delighted to assist you today, @gray-liz.

QuickBooks Online supports size 10 windows since the customer's address is only visible in this envelope.

However, we can change the setup of your window envelope. Here's how:

1. Go to the Gear icon, then select Custom Form Styles under Your Company.
2. Select the form that you want to modify then click on Edit. Note that if this is your first time customizing a form, you'll have to select New Style and choose Invoice.
3. Click on the Design tab, and select Edit Print settings.
4. Put a check on the boxes before Fit to window envelope and Include payment stub.
5. Select Done.

In addition, I'll be including this article that'll guide you if you want to print forms for window envelopes: How to print forms for window envelopes in QuickBooks Online.

If you have any questions or concerns regarding invoices, let me know by hitting the reply button. It would be my pleasure to help you out. Wishing you well. 

I can't find the "custom form styles".  It is not an option listed when I go to settings.  Please see attached image.

Hi, I'm having the same exact issue using Chrome. Tried the incognito window, no luck. Also tried Edge and no luck. any other reason I can't access custom forms? Is there another way to get there?

Let me walk you through to help access the Custom form style in QuickBooks, @Jeff5578.

Since you already tried the steps provided by my colleague and the issue persists, I suggest contacting our support team directly. They have the tools to check your account in a safe environment to help find the root cause of your issue and provide a fix.

Here's how to reach them:

1. Sign in to your QuickBooks Online company.
2. Select the Help (?) menu.
3. Choose the Assistant tab.
4. Click the Talk to a human option.
5. Select Get help from a human.
6. Click either the Chat with us or Have us call you button.

Moreover, I'll be sharing these articles to help personalize your sales transactions in QuickBooks: 

• Customize invoices, estimates, and sales receipts in QuickBooks Online
• Add, customize, or remove logos on sales forms

If you encounter any difficulties while managing your form templates, let me know. I'm always available to help. Stay safe!