Queenluxury, it doesn't matter about whether you had any income of not, but rather whether you will pay any tax as you can't get a rebate (money back) for tax paid if you didn't pay any tax, does that make sense? For example if you earnt under the tax free threshold, you would have earnt income, but not paid tax, so you wouldn't be able to apply for the rebate through your tax return and get your full rebate entitlement.

With that said, if you have a partner/DH who paid tax, then the medical expenses tax offset should be put through their tax return. This is a very straightforward rebate, so have a look at the ATO website and you will find details on what can be included in medical expenses (prescriptions for example can also be included).

As per below from the ATO website (have a look at the website and google 'medical expenses tax offset' which will give you more info).

The medical expenses tax offset only applies if your net medical expenses exceeds $2,060 excluding contributions to private health insurers, travel or accommodation expenses associated with medical treatment or inoculations for overseas travel.

Hope this helps - any more Q's just let me know

You can only claim medical expenses for yourself and/or your dependants who are Australian residents for tax purposes.