Target $18.72, page-5825

Hi @minoil as best I can determine
The franking account balance at 30 June 2022 was 0. The dividends subsequently paid of $369M and $274M would have taken the franking account into deficit. $522M of that would have been sorted with their tax payment end Feb, but still an estimated deficit of $81M. It is possible (as suggested by others at the time), that this was a reason why the interim dividend was underwhelming.
Tax payments were set to convert to PAYG (quarterly) from the last quarter of TFY (which would have been 28 April based upon ATO PAYG payment dates). So at least the $766M owing for the first half of TFY should have already been paid (meaning circa $675m in available franking credits), and possibly the circa $400m in tax for the March quarter, would also have been paid 28/4. Then tax for the final quarter would be payable by 28/7.
So with circa $1.5B available (after tax and buybacks) at 31 March, and then whatever the final quarter brings, their should be ample room for a decent full year dividend that is not restricted because of a lack of franking credits (and still plenty for the buyback).