I have a basic understanding of what you want to see and reactivate some transactions in your QuickBooks Online (QBO), @jatco. On the chart of accounts check mark the box related to inactive.

Here's how to make an account active again:

1. Go to Settings ⚙, then select Chart of Accounts.
2. Select the Gear icon ⚙ next to the printer icon. Then select Include inactive.
3. Find the account you want to use again, then select Make Active.

Keep in mind, that QuickBooks Online won't add transactions back to the account or edit any journal entries it made to balance your accounts.

For future reference, you can learn how to permanently delete an account, except for merging one account into another.

I hope to hear from you regarding activating transactions in your chart of accounts, feel free to comment below. Have a great day!