hi, I am a single parent. Looking to sell some shares to raise...

hi, I am a single parent. Looking to sell some shares to raise some cash to buy perhaps.. some more shares...
In order to maximise the Family tax benefit that I receive, I shd look at the selling the shares I have held for 12 mths shouldn't I? (rather than ones held for less than 12 mths) i.e. I know it reduces my CGT by 50%, but I assume it therefore also reduces my assessable taxable income with Dept of Human services as well? Hope that makes sense. thank you And yes, I know there are other factors to consider when thinking of selling, but just looking at it from this angle atm. thanking you... Happy New Year to all.