In case anyone still uses the traditional 'shoe-box filing system'
and finds at tax time that they have 'inadvertantly' misplaced any dividend statements
then the formula to calculate the franking credits that might have been attached to the dividends is:
franking credits = (franked portion of dividend) / (1 - company tax rate) x (company tax rate)
eg.....if franked portion of dividend = $100 and is full franked at a 30% company tax rate
then franking credits = 100 / (1 - 0.3) x 0.3 = $42.86
cheers
bullmarket