Full customization of QBO forms, invoice

That's a great idea you have there, @jang430.

Yes, QuickBooks Online allows you to modify the spacing within the lines of your invoice custom form styles from the Content tab. You can adjust the line widths from there. However, we're unable to customize it more than what is shown.

I recognize how beneficial it is for you and your business. With this, I suggest sending this suggestion to our Product Developers. They might consider adding this recommendation in future updates. Here's how:

1. Click the Gear icon and choose Feedback.
2. Enter your feedback Suggestion.
3. Press Next.

Also, we can create custom fields on your sales forms that allow you to add custom data. If you're using QBO Plus and Essentials versions, you can create up to three active custom fields. While for QBO Advanced, you can make up to twelve active custom fields.

Here are the steps to create them:

1. Go to the Gear icon.
2. Under the Lists column, select Custom fields.
3. Click the Add field button, and enter your preferred name (e.g., Name of Salesperson).
4. Mark check the All Sales Form or Invoice.
5. Click Save.

Here's an article for more details about custom fields: Add custom fields to sales forms and purchase orders in QuickBooks Online.

Moreover, this article can help you in accounting for your customer's payments in the future: Receive invoice payment.

I'm here to help you if you have any other concerns regarding your invoices or want to share your best practices using the product. Just fill me in with the details in your reply. Take care always.