If you married during the year you may be eligible to claim a tax offset for your spouse which will depend on your spouse's income. A Medicare reduction may also be available. You will need to know the taxable income of your spouse before and after marriage. If your spouse has earned income during the year, she will also need to lodge her own return. On both returns, you will be required to disclose information about the other partner so that any entitlement you may have to certain benefits can be calculated correctly.