Apologies for not being clear…. My partner has the two loans ( PPOR + IP ), the equity is all in the investment loan, there is not a great deal owing therefore not a great tax return…

I am wondering if its possible to sell / transfer part of  the property to me, I would buy in at current value and refinance the loan into 2 names and increasing to a 80% LVR…. or I could even buy him out prior to us getting married. I understand that there would be stamp duty … but long term I am thinking of the tax benefits….thanks for your help.