Banter and general comments, page-29605

"PS: Tax is the only issue I have now and have no idea how much I’ll need to pay on capital gains."

For those shares held longer than 12 months (and therefore subject to CGT discount), calculate your profit, divide it by 2 (your CGT 'discount'), and apply your marginal tax rate to the result.
If you've held any for less than 12 mths, the CGT discount won't apply to profit on those , and you'll pay the marginal tax rate on the full profit.

eg assuming profit of $100,00 (and all held > 12mths)
100,00 divide by 2 = 50,000 subject to CGT
assuming you are in the 45k-120k tax bracket (marginal rate 32.5) = tax payable on share sale $16,250