Thanks for getting back here, @peggycnelson.

When your client experience error when importing an accountant's changes, they can perform the following troubleshooting steps:

1. First, copy the file locally (refer to the outlined instructions by my colleague, MadelynC).
2. Next, create a QuickBooks portable company file.
3. Resolve the data damage on your company file.

For additional solutions, please see this article: Resolve errors when creating or working on an accountant’s copy.

To further assist you with this, I recommend reaching out to our technical support team. They can further investigate the root cause of the issue and help you fix it. Here's how:

1. Go to Help, then select QuickBooks Desktop Help.
2. Click Contact Us.
3. Enter your concern in the question box. Example: Accountant's copy import error. 
4. Then, select Let's talk and then choose a way to connect.

I also encourage you to visit our Community page so you can search for any QuickBooks guides and articles to help you with your accounting tasks. 

Please give them a call and let me know how it goes. I'll be waiting for your response. Thanks for posting here and take care always.