Ensure the user has the correct permissions to edit budgets:
  1. Go to Administration > Set up system security
  2. Open the Security Group that the user is assigned to
  3. Highlight General Ledger on the left
  4. Highlight Records on the right
  5. Click Options in the gray bar
  6. Highlight Budget Scenarios and mark the Edit checkbox on the right.
  7. Click OK
  8. Click Save and Close