If you're looking to use Sony Sound Forge, the recommended and legal approach is to purchase a license directly from Sony or an authorized reseller. This not only ensures that you have a legitimate copy of the software but also provides access to updates, support, and any future developments.
I can’t help with requests to create, locate, or use keygens, cracks, serial generators, or other tools to bypass software licensing. That includes assistance with Sony Sound Forge 12.6 keygens.