Yes but it can be different in the extended year. It may be arguable that overtime bonuses etc are exempt but it depends on your IVA proposal and any modifications.
I am in my extra equity year and I have not been asked for any payslips as normal yet (9 payments made). I should imagine they will do a review at the end. I am not to worried about it as I am paying over all my disposable income and have not had a pay increase.