I think there is a compay (try to find out the name of this company) that buy from you the shares (or oppies) to help you with the tax. I think they do the transaction offline and they update the registry. You have to pay this company to buy your shares or oppies. I think they charge around 100$.
I forgot the name of this company. If no one here know the name, I will ask for you.
Regards and best wishes,
Amer.