Would an overpayment in tax not have a direct afefect on disposable income as opposed to the IVA payment, surely any over payment in tax should go direct to the debtor?
Your net income in that pay day will be increased by the tax refund. You certainly don't have to pay it over, but as Melanie says inform your Supervisor
Regards, David Mond, Insolvency Practitioner for over 46 years. Personal Insolvency Practitioner of the year 2012, Personal Insolvency Practitioner of the year finalist 2013 & 2014 awarded by Insolvency & Rescue Magazine and 2015 finalist for Personal Insolvency Firm of the Year.