You can't make an 83b election for RSUs. RSAs yes. Option grants for sure. RSU taxation is very straightforward compared to those. They count as W-2 income when

You can't make an 83b election for RSUs. RSAs yes. Option grants for sure. RSU taxation is very straightforward compared to those. They count as W-2 income when they fully vest and turn into shares. There isn't anything to elect as 83b because they don't get any special tax treatment after that vesting date.