If you want to apply for a Medicare Levy Exemption, you can do this as part of your tax return.
You need a Medicare Entitlement Statement (MES) to apply for an exemption.
You need a Medicare Entitlement Statement for each year you want to get an exemption.
When you lodge your tax return, you need to tell the Australian Taxation Office you have a Medicare Entitlement Statement.
You should also keep the Medicare Entitlement Statement for your records.