Modifying the look of my invoice

Hey there again, @Dawn_at_Throw_Pink. 

I appreciate you reaching back out and letting us know the version of QuickBooks Online that you're currently using to modify/customize your invoices. 

Since you're unable to see the Custom Form Styles option in your settings, you could have the new version of estimates and invoices. The new version allows you to customize the invoice as you're creating it. Here's how: 

1. Go to the Sales tab on the left-hand menu bar. 
2. Choose Invoices. 
3. Select Create invoice or Create estimate to create a new form. Or to edit an existing form, select an invoice or estimate from the list and select Edit.
4. To update your company info, pick Edit Company. Make changes as needed, and then hit Save.
5. To edit your company logo, select the logo on the form. Then choose an image from your computer, and tap Open to update the logo.
6. To add or remove fields, change the color scheme, or turn on payments on invoices, click Manage ⚙.
7. Select a section like Invoice settings, Payment settings, or Deposits.
8. Tap the dropdown ▼ for each section to see customization options.
9. Choose what info displays on your form by turning the switches on or off. Note: As you make changes, a preview displays on the form.
10. When you're finished customizing, click Save.

If you don't have this option, I recommend clearing your browser's history or trying another browser. In the end, if this works for you but like the old version better, you can switch back. Here's how: 

Note: Before doing these steps, review this guide for more details on certain features you will and won't have when switching back: See what's new with estimates and invoices. 

1. Tap + New button.
2. Select Invoice or Estimate.
3. At the top right of the form, pick Old layout.

It's that easy! 

This should do the trick. I'm only a post away if you have any other questions. Have a wonderful Thursday!