You've got me here to provide some clarifications about starting a new company file for Quick Books Enterprise 2023, Super1900.

Yes, you can run several months of transactions while waiting for your accountant to give you the beginning balances that she would like you to use. You can check out this article to fix beginning balance issues in QuickBooks: Fix beginning balance issues in QuickBooks Desktop.

Since you already use the Condense Data tool to create a new company file from the existing one. In this method, it deletes the transactions in the existing file to start fresh. As another option, you can also create a new company file and carry over the data you need from the existing file. Before anything else, we'll need to back up your company file.

Then, we can keep a copy of your account balances. This will be used to enter your beginning balances. Here's how:

1. Ensure your books are up to date. Then, go to the Reports menu.
2. Next, select the report you want to keep a copy of:

• Account balances: Select Company & Financial, then Balance Sheet Detail.
• Customer balances: Select Customers & Receivables, then Customer Balance Detail.
• Vendor balances: Select Vendors & Payables, then Vendor Balance Detail.

1. You can also customize the reports and set the correct date.
2. On the report window, select the Print dropdown.

After that, you can now export your lists to avoid entering them manually. The data from your old company file will be carried over to your new one. Next, create a new company file. Once done, import your lists and enter the beginning balances. 

When finished, you can re-set up your QuickBooks features and services to help you manage your books. For reference, check out this article: Start a new company file with data from your existing file. 

I'm confident this will take you in the right direction. Please keep me posted if you have any additional questions, as I'm always here to help. Wishing you the best.