I want to know how to write off a few invoices in a customer's transactions but not the customer.

Good evening, @paulrusso75. 

I'm so glad you came to the Community with your question about writing off invoices. Allow me to give you some insight about how to write these off. 

When invoices you send in QuickBooks become uncollectible, you need to record them as a bad debt and write them off. This ensures your accounts receivable and net income stay up-to-date. 

Here's how to do so: 

1. Check your aging accounts receivable
2. Create a bad debts expense account
3. Add a bed debt item
4. Create a credit memo for the bad debt
5. Apply the credit memo to the invoice
6. Run a bad debts report

For detailed instructions on how to do the actions above, check out this guide: Write off bad debt in QuickBooks Online. 

Reach back out to the Community with any other questions you may have. If you run into any trouble along the way, just make your way back here. I'm only a comment away. Have a great day! 

Thank you for your help I am going to try it. I thought I did this but it ends up with my other checks that I have to deposit.  So I did that deposited and it ends up in my check register as a deposit? But let me try it step by step and I can come back to this and state what happen.   

Hey there again, @paulrusso75. 

Yes, please let us know how those steps work for you after going through all of them. 

We want to ensure that you get these invoices wrote off as soon as possible. I'll be waiting for your response!