It looks like Myer has a few offers currently running at the same time. I haven’t found all the details but this is what I do know…
15% off until March 13th
A range of sets are listed as being 15% off until March 13th 2023. This is the smaller of the sales comprising mostly of Minecraft and Technic.
20% off until March 19th
The larger of the two sales also happens to be the one that last the longest. This sale contains over 140 sets, but is lacking in big ticket items. You can check this one out here.