You came to the right place, johnjarrell.
I'm here to provide an overview about the process of changing business entity in QuickBooks Desktop.
You can opt to create a new company file to operate your business under S corp. This helps the program recognize that there are changes with your tax forms and still have access to the C corp data come tax time.
Refer to the steps below:
Here's an article for more information:
Once done, export all the lists (Chart of accounts, vendors, customers, employees, etc) from the old business's QuickBooks file and import them into the new one. Please note to consult with an accountant to ensure all your transactions balances, such as the fixed assets and equity section are set up correctly.
I've added an article with a quick view about the file types and formats you can bring in to or out of the program:
These steps and resources can help you with the setting up of your new account.
The Community is a great avenue to connect with accountants and other QuickBooks users. If you have other concerns, feel free to drop a comment below. I'll be around.