@accountingassoci
The "Accounts" name that you see on the Budgeting screen comes directly from the Name that you set up in the Chart of Accounts. If you need to change it, you will edit your Chart of Accounts.
Here is how to edit your Chart of Accounts in QuickBooks Online (QBO):
1) From the Left Dashboard, select Accounting and then the Chart of Accounts
2) Once you are on the Chart of Accounts page, locate the Account Name in question
3) Under "Action" column, select drop-arrow and select "Edit"
4) Edit Name and choose Save/Close
That should do it.