I would like to have the possibility to do 100% allocation only at the entry level. This means I do not want to have a possiblity e.g to allocate 30% of the expense into one Cost Center and 70% of the expense into different one. The seeting I need to have is 100% allocation only into needed Cost Center. Please share with me any best practices.
To achieve this you need to make sure that your Cost Center field is visible on all entry level forms. The field will need to be an active field (not read-only). This way your employees can choose the appropriate cost center from a drop-down list of your cost centers. By choosing one cost center from this drop-down list, the expense will be charged (100%) to that cost center.