New bank account added due to fraud, old accounts diappear on balance sheet

Hello there, Detroit313.

Based on the information provided, it looks like the accounts that disappeared are sub-accounts of the old or main account. When customizing the Balance Sheet report, you'll have to manually select the sub-accounts so they'll show up.

Here's how:

1. In your company file, head to the Reports menu at the top to choose Company & Financial and Balance Sheet (Detail or Standard).
2. Click the Dates drop-down and set the correct period.
3. Set the reporting basis: Cash or Accrual.
4. Tap the Customize Report button to open the Modify Report window.
5. In the Filters section, choose Account and then Multiple accounts.  
6. From there, select the sub-accounts. 
7. Click OK for the changes to take effect. 

This reference covers all the basic information you need to learn about reports: Customize reports in QuickBooks Desktop. It includes some links to the tasks you can do using the feature.

In addition, the following link provides a list of topics that will guide you on how to handle any accounting processes in QuickBooks Desktop (QBDT) such as banking, managing your cash flow, and reports, to name a few: Self-help articles. 

Keep in touch if you need further information about customizing reports or other QuickBooks concerns. I'd be delighted to answer them. Have a good day.