When invoicing for labour only do I put it under the sales tab or do I need to create a new one?

Hello there, @gplcarpentry.

Good to see you here in the Community. I can help guide you on creating invoice for labour in QuickBooks Online (QBO). 

If the labour that you are invoicing is from your contractors, then you can create an invoice so you can charge this to the customer. You can follow the steps in this article on how to create an invoice. 

However, if you are under CIS, then you can follow the detailed recommended steps in this article: CIS in QuickBooks.

If you need further assistance with the steps, I recommend contacting our QuickBooks Online Support Team. They have additional tools to pull up your account and do a screen-sharing. 

Here's how to contact our customer support:

1. Sign in to your QuickBooks Online company.
2. Select Help (?) at the top right.
3. Select Contact Us to connect with a live support agent.

This should get you on the right track. Don't hesitate to leave a comment below if you have any other questions about invoicing transaction. I'll be around to help.