I formed 1 a SBR back in 2009. I move across state lines in 2011. At the time of my move, the SBR upper had been sold and I only have the lower. I also had a 5320.20 filled out for the state we moved to for temporary tracks since my family lived in the state. I fell away from AR’s with kids being born and no time for the hobby. I do not think I ever did a permanent address change on a 5320.20. I also never bought another SBR upper for that register lower. I now want to build a new upper for it but I am wondering if I need to now update with a 5320.20 before I do it. How would I even fill this out now that I moved 8 years ago?