If you have moved overseas there are exemptions that can allow you to be treated as a New Zealand resident for student loan purposes even though you are not physically in New Zealand. If you can gain this status it can mean that some or all of the interest will be removed from the debt and the relevant payment will be calculated based on your income as if you were still living in New Zealand. The benefit can be significant.
In most cases we can quickly tell you whether you might qualify or not, without needing to involve the IRD, however, we can also discuss the situation with the IRD if we have your permission.