I accidentally inactive customer. if there anyways to restore online file from some where or redo.

Yes, there's a way to recover the accidentally inactivated customer, @pressociate. Allow me to provide the specifics below.

When restoring the files of your inactive customer, you can go to the Customer tab and make them active again. Let me show you how to do it:

1. Go to Sales, then select Customers.
2. Near the header of the ACTION column, select the Gear icon.
3. Tick the Include inactive checkbox.
4. Find the inactive customer on the list.
5. In the ACTION column, select Make Active.

For future reference, you want to check these articles to guide you through the process of creating and recording invoices in QuickBooks.

• Create invoices in QuickBooks Online
• Record invoice payments in QuickBooks Online

If you have additional questions or concerns about accessing inactive customers, please don't hesitate to post them here by clicking the Reply button below. I'm always here to assist you.