Hi anltd,
It's a pleasure to see you in Community. Welcome! QuickBooks Online has the features you need to securely communicate with your accountant. I'll be happy to provide more information so you can accomplish your QuickBooks goals in a timely fashion!
When your accountant sends a request for information or documents, you'll see it displayed in the My Accountant page and you can respond from there. Here's how;
1. From the left menu, open My Accountant
2. Select the Requests tab
3. Add comments or securely upload documents in the Respond to request pane
4. When finished, hit Close
You're response is ready for your accountant to review. Here's a helpful guide for future reference.
If you have any other questions, feel free to reach back out. We'd love to help!