Budget Control for External Transactions (Entry created via Custom SaaS Travel Management Form)

Summary:

We need to reserve budget through a Custom SaaS form.

Content (please ensure you mask any confidential information):

We cannot use PR or PO to reserve the budget. We need an external transaction to do so.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):