Is it mandatory to have an Income Tax Return (ITR) of at least 13 lakhs for visa application in Australia, and can a sibling's ITR be used as proof of financial support?

No, an Income Tax Return (ITR) of ₹13 lakhs is not mandatory for an Australian student visa. The key requirement is to show sufficient funds for tuition, living expenses (currently AUD 29,710/year), and travel.

You can use a sibling’s ITR as proof of financial support if:
- You provide an affidavit of support from your sibling.
- You submit proof of your relationship.
- You include your sibling’s financial documents (ITR, bank statements).

All documents must be genuine and clearly show your sponsor’s financial capacity. Visa rules and required amounts are subject to change.