Hi @ Tammi196,
As to QuickBooks Desktop, Budget feature only relates to Income and expenditure for a set period of time. Adding Liability Account in the Budget is not possible since this report is set for cash basis. Liability are still considered to be paid or unpaid amounts, which means there is no assurance that this money will be part of the business.
Budgets are created to know if you have exceeded the expected income or expense for the business and not the payable and receivable. The reports for the budget are usually partnered with Profit and Loss Report.
For helpful articles about budget please check below:
Create a budget or forecast in QuickBooks Desktop
How to create, edit, and manage budgets
Please drop us a comment for further question.