Greetings, @Smak1.

All the lines showing on the budget page will depends on your Chart of Account (COA). You can add a line in your budget by adding an account to the COA.

Here's how:

1. Go to the Accountant menu, then choose Chart of Accounts or Ctrl +A. 
2. Click the Account drop-down arrow, then select New.
3. Pick an Account types and hit Continue.

      4. Complete the needed information, then press Save and close. 

After that, let's go to the Budget page to check if the line is successfully added. You can go to the Company menu, then hover over Planning & Budgeting and select Set Up Budgets. 

I've attached a screenshot for your reference:

For future reference on how to delete an account and memorize reports, please check these articles:

• Create, access and modify memorized reports
• Create, edit, or delete account in QuickBooks

If you have follow up questions, please let me know by leaving a comment below. I'll be glad to check on them for you. Have a good one!