Note that it will warp further when you get it home since Home Depot wood is unlikely to be fully dried and the environment in your home will be different as well.

You’ll need to wait a couple of weeks to see what shape the wood settles into. If you try to build something now it might end up warping after construction.

Even if you’re working with S4S lumber you still need to let it acclimate and then finish milling it if you really need very square pieces.