During the pre-application phase, do we have to mention the total eligible budget of each partner?

The partner’s total eligible budget is calculated automatically on the basis of the partner’s detailed budget; you do not need to enter the amount by hand.
As this detailed budget can only be entered during the second stage, it is in the full application form that the partner’s total eligible budget will be requested. The courtesy pre-application form has been modified accordingly and no longer includes this mention.