For my example I have current year deferred losses of 999 & Prior Year Deferred Losses of 1000.

Business --->Net Income

Deferred Losses

Business Loss Activity Details

Commercial Losses Carried forward

Don't fill any information relating to Non Commercial Losses if the loss is not non commercial.

Note: P8 Deferred non-commercial losses from a prior year” user has to manually enter deferred losses if they are relating to same or similar activity from the previous year.