Deactivating Periods

If you're building a forecast with part actual and part budget data, Deactivation will switch off your formulas in the actual months.

Deactivating periods will zero the data and switch off all formulas and budgeted employee payroll information for the periods selected. This then makes it possible to copy actual data into those periods without worrying that your formulas might affect your actual data. 

Go to Scenarios > Manage Scenarios and click the edit tool for the scenario you wish to work on.