It depends on the details. Often RSUs in non public companies come with a double trigger: you need both the vest to happen and a liquidity to happen for the ac

It depends on the details. Often RSUs in non public companies come with a double trigger: you need both the vest to happen and a liquidity to happen for the actual delivery of those, so no tax implications until a liquidity event (afaik. But don’t take tax advice from randos on the internet).