I receive payments from two different sources on my invoice (one from the client and the other from the insurance company). How can I track who made which payment?

Welcome to Community, 42099emily.

I am here to help you on how to receive payments on invoices in QuickBooks Online.

Here's how:
 

1. Click the Sales, choose Invoices. 
2. Open the invoice you want to receive payment. 
3. On the right side corner tap Receive payment. 
4. Press Save and close at drop-down arrow. 

You can utilize this link for guidance in recording customers payments efficiently: Record invoice payments in QuickBooks Online.

Keep me in the loop if you have any other concerns or questions managing your invoices. I'll be around ready to help you. Stay safe!