Let me assist you in adding a class to an existing budget.
When creating a budget, it is possible to add up the sub-classes to the whole of their parent class, but it is important to select the appropriate subdivision method, such as by class, and avoid using consolidated or location/customer-based subdivisions.
Here's how:
On Gear click Budgeting.
Fill out the information needed, and under Subdivide by, select Class
Enter the necessary information in Add subdivided budget for.
Add your budget for each account.
Click Save or Save and Close.
Once done, you can run the budget report to see a consolidated total for the parent class.
If you have more questions about adding class to an existing budget, feel free to comment below and we'll respond to you as soon as possible. Take care!