Hello there, Julian-.
You can get the form 8829 copies to the IRS. Click this link to route you to IRS support: Contact IRS.
I'm adding some article that can help you while processing and filing your 2020 taxes:
To help you with future tasks and tips when using QBO, you might want to visit our Help Articles.
Get back to me if you need help with something else. I'd be happy to assist. Enjoy the rest of the day!