Once opened, you can store your uncooked tofu in the freezer for 3 months. We suggest slicing it first so you can just grab how much you would need instead of working with a huge frozen block. However, as much as possible, we don’t recommend freezing your tofu in a very long period of time as this will change the texture and taste of the tofu negatively. What you can do is to store tofu in the refrigerator instead. It doesn’t matter if it is sliced or not since it will not become hard unlike when placed in the freezer. It can only last for 3 to 5 days but the quality will stay the same. Just remember that when storing tofu, it is important that it is properly sealed in a container. This prevents bacteria build-up and spoilage.