There is a workaround to change your regional settings so that is easy, but at times when you are using date effective tax rates and a regional setting of dd/MM/yyyy
You will be prompted with this message based on dates entered.
This change will affect current tax calculations. Do you want to recalculate taxes? ‘Recalculate’ and ‘cancel’
Ideas Administrator

Thank you for taking the time to share your product suggestion with us. We value your input and appreciate your interest in improving our services. After careful consideration, we have decided not to implement your suggestion at this time.
Terry Heley