Same! My legal name is on some pieces of internal material which I totally understand. They’re usually like tax documents or whatever. One really annoying one is that my work email uses my dead name. My preferred name just redirects to my dead name in Outlook. I’m looking into getting my legal name changed ASAP so that I can change my legal name in the system.
Luckily there are a lot less systemic barriers against trans people in the NE US (where I am now) than in there are Texas. I still don’t understand the process of getting my name changed (it feels way too complex to me, possibly intentionally so), but it seems like it’ll be easier from what I’ve read so far. There are a lot of legal resources online to help trans people navigate the obtuse legal system. Hoping you can get your legal name changed soon, too!