How doI unlink a PayPal account? I accidentally linked my personal account and not my business account.

Welcome to Community, streetmanmarykat. 

I’d be glad to help you with disconnecting PayPal from your QuickBooks Online.

Here's how:

1. Go to Transactions, and click Banking.
2. Click the pencil icon on the PayPal bank account, and click Edit account info.
3. Check the box for Disconnect this account on save, and click Save and Close.

For additional information on how to delete or disconnect a bank or credit card account, you can refer to this article: Disconnect or delete accounts connected to online banking.

In case you want to reconnect your PayPal account or credit card account open this article for the detailed steps: Connect bank and credit card accounts to QuickBooks Online. 

You can always get back here if you have other concerns or questions about disconnecting accounts in QBO. I'll be here to help you. Stay safe.