For the projects that have more than two beneficiaries, one or two changes are allowed, depending on the initial number of partners. For more detail, you can refer to item 3.4 of the fact sheet 3.2 in the Sudoe programme manual.
Regarding the budget, you can reduce the global budget of the project or modify the allocation between the partners, but you are not allowed to increase the global project budget foreseen in Step 1. Besides, you have to respect the thresholds mentioned in the Sudoe programme manual (100,000 euro mimimum budget per entity or 5,000 euro for an entity under category IV).
Regarding the working groups and the schedule, no change is allowed. The number and name of the working groups may not be changed, and the total project duration in months may not be modified.
For further information about changes between the two steps of the call for proposals, you can refer to item 1.3 of the fact sheet 5.0 in the Sudoe programme manual.