Hello elginon,
I know it can be tough on a business when these situations arise. It's always best to double check with an accountant for these sorts of situations to make sure that the transactions are being recorded the way you need them to be. One process you can consider is writing off the invoices as bad debt.
This process is used when you cannot collect from your customer, but need to deal with the transactions. I've got an article here that can walk you through the steps: Write off bad debt in QuickBooks Online
To connect with an accountant, there are two options: invite an accountant you already work with as a user to your account or find an accountant through QuickBooks Online's Find a Pro to Help feature. Both of these things can be done through the My Accountant tab on your account. With the Find a Pro to Help feature, you simply need to enter your postal code to find an accountant in your area that knows the program. The following article outlines another way to invite an accountant: Invite or remove an accountant
I hope that helps! Have a great week.
