In the Budget Requests section, you will see the list of all budget requests for the matter, sorted in descending order from most recent requests. Any time you submit a budgeting (or re-budgeting) request to your client for the matter, the Proposed amounts in the Matter Budget table update to reflect your latest proposals. Similarly, the client Allocated amounts update every time a client approves your proposal.
You may initiate a new budget request for a matter that does not already have a pending budget request. For details, see How do I initiate a request for rebudgeting?