I have read my recordkeeping obligations in line with https://www.ato.gov.au/law/view/document?docid=TXR/TR20002/NAT/ATO/00001
However, one part is not clear is that if I hold a joint home loan and I am redrawing for the purpose of purchasing investments in my name solely, how does this impact on the amount of interest that I can claim? Is the interest on the deductible portions of my mortgage reduced by half simply because it is a joint loan?