I have acidentally delected all the datas, can it be restore by quickbooks ?

Restoring your QuickBooks Online account to the version where all data will be back is unavailable, 51Taxation. For now, let's manually enter the data you've accidentally removed, and I'll share the steps below.

There's no way to restore a deleted transaction. However, you can use the Audit Log to recover and re-enter its details. Follow the steps below:

1. Go to the Gear icon and select Audit Log.
2. Choose the appropriate user, set the date to last year, and event(s) from the Filter ▼ dropdown menu.
3. Hit Apply.
4. Locate the eliminated entry.
5. Under the History column, click View.
6. Under the Event column, all the information needed is displayed.

Once done, utilize the information from the Audit log to add invoices and expenses with their original transaction date. I'm adding these resources for your guide:

• Create invoices in QuickBooks Online
• Enter and manage expenses in QuickBooks Online

To learn what more you can do with an audit trail, refer to this article: Use the audit log in QuickBooks Online.

Check out these materials for future reference in tailoring sales forms and recording bills to be paid later:

• Customise invoices, quotes, and sales receipts in QuickBooks Online
• Enter and manage bills and bill payments in QuickBooks Online

For other concerns besides restoring deleted transactions, add them to your reply below. I'll be here to address them. Keep safe always.