If anyone hasn't tried yet, try restarting your computer if using TT desktop for successful transmission for federal and state. I was experiencing the same Failed Validation during transmission, even after the updates. However, after reading the threads and calling in to TT, (800) 446-8848, the very kind representative walked me through possible resolutions, and once restarting my computer, allowing for the most recent 02/12/2025 update to install, I was then able to successfully complete the both the federal and CA state transmissions. Hope this helps someone, good luck.
