Nice to have you join this thread, @Mark K1.

To add a new account to your budget report, you’ll need to recreate the report to add a new one.

However, if you’re referring to creating a new budget and the account doesn’t show in the budget screen. I recommend closing and reopening your QuickBooks Desktop (QBDT) software for the changes to take effect.

If the issue persists, I suggest running the Verify Rebuild tool to isolate this issue. This tool scans your company file for errors and fixes them right away. Let me guide you how:

To Verify:

Go to the Window menu and select Close All.

Then, go to the File menu.

Select Utilities.

Click Verify Data.

To Rebuild:

Go to the File menu.

Select Utilities.

Click Rebuild Data.

Here's an article you can read for more detailed steps: Verify and Rebuild Data in QuickBooks Desktop.

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You also have the option to personalize your report to focus on the data that matters to your business. To be guided through the process, you can utilize this link for your reference: Customize reports in QuickBooks Desktop.

Keep me posted if you have any other concerns or questions about managing your reports or with your account. I’ll be around ready to lend a helping hand. Have a good one.