How do I edit column widths within my sales invoices?

It's good to have you here in the Intuit Community, melanie-shilling,

I’d be happy to show you on how to edit column widths for your sales invoice.

Here's what you'll need to do:

1. Click the Gear icon at the top.
2. Click Custom Form Styles under Your Company.
3. Choose New Style, then select Invoice.
4. Click the Content.
5. Choose the Table (middle part).
6. Click the Edit Labels and  Widths.
7. Adjust using the sidebars.
8. Click Done.

That's it! For future reference, you can read through this article for the complete details about customizing invoices in QuickBooks Online: How to customise invoices, estimates, and sales receipts.

If there’s anything else I can help you in customising invoices, please let me know. I’m always here to help. Have a great day!