Is there a way I can restore Quickooks back to the beginning?I deleted a bank account and need to delete all the transactions previously added to register.
There are no user usable restore points with QBO, you cannot make your own backups. You can, if opened less than 60 days, purge ALL data to start over https://quickbooks.intuit.com/community/Account-management/Delete-QuickBooks-Online-data-and-start-f... bit it wipes all your transactions not just from the one bank. Otherwise, if you accepted these as a match or added them to the register you must delete one by one. If, in hindsight , you would have reversed the match or add and placed them back in The For Review then when you deleted the bank account all items in the review status would have been deleted.
Data deletion is complete so if you added accounts, vendors, customers, you must export lists and re-import.
If your file is older than 60 days you have to start a new company in order to start fresh