How do you restore an account that was accidentally de-activated?

Hi there, @rfiat. Thanks for taking the time to reach out to the Community for support.

I can help you restore your deactivated account in QuickBooks Online. Here are the steps on how to do so: 

1. Go to the Accounting menu and select Chart of Accounts.
2. Click the small Gear icon below New, then check the box for Include inactive.
3. Look for the inactive income account and click Make active under the Action column.
   
   
   

If you mean to restore your deleted Intuit data, we're unable to get it back for you. However, we can manually download your data if you have kept a backup.

This article contains additional information about this process: Make an account inactive on your chart of accounts in QuickBooks Online.

I'll also add these handy resources that can guide you in managing your Chart of Account in QBO: 

• Learn about the chart of accounts in QBO
• Create sub-accounts in your chart of accounts

Drop by this thread again if you have future concerns with your accounts. The Community is always here to offer help. Take care always.