Provided you have enough credit card capacity you can just change the date of your monthly cycle so that your BAS and income taxes hit your cards into the new month by a day or two so you get many days of free carry on the interest free basis.Having it work this way will save you quite a bit over a year.
We get 12 monthly bills and about 10 quarterly bills so it is close to 52 tax bills a year.
If you can run $xx_,xx_ free for each month you can have a free smile.