Yes, there's a way to turn off invoice columns by utilizing the Manage option or the Custom form style menu, Dustin. I'm glad to lead the way and assist you in adding notes to your invoice line items in QuickBooks Online (QBO).

Please know that to hide some information when printing invoices, we'll also have to switch it off on the main Invoice page. That said, the columns you choose to turn off will also be unavailable to display when generating invoices.

To proceed, we have two options depending on the details you want to conceal. The first one is to disable the column(s) directly from the Invoice page:

1. Go to the Sales menu and select Invoices.
2. Choose any invoice and click the dropdown arrow under the Action column.
3. Pick View/Edit, then Manage.
4. Tick the Customization dropdown and deselect the columns and information you want to hide.
   

The modifications you've made will automatically apply to the following invoices you create for your customers.

Meanwhile, the second option is to utilize the Custom form styles to turn off any columns or details. Here's how:

1. Go to the Gear icon and select Custom form styles.
2. Locate your default invoice template and click Edit under the action column.
3. Pick the Content tab and click the Pencil icon for the Header, Table, or Footer.
4. Untick the details you want to switch off.
5. Double-check everything and click Done to save.

On the other hand, regarding the notes for your invoice, do you mean for the whole invoice itself or add a note to each invoice line item? If it's for each line item, you can input it into each item's Description field when generating invoices.

Just make sure to activate the Description section from the Manage option.

However, if it's for the whole invoice, you can use the Note to customer field from the lower portion of your invoice to input the note.

Nevertheless, if you mean something else, please provide me with additional information so that I can help you accurately.

Additionally, you can record an invoice payment once your customer pays their outstanding invoice. Doing so ensures you'll have accurate sales data in the system.

I'm still here if you have more queries about invoice columns, notes, or other transactions and data. Just comment below, and rest assured I'll get back to you promptly.