I have two questions, I think the first will be simpler.
If buy an ADR stock in say Santander or Telefonica do I have pay Spanish capital gains on the stock and file a spanish tax return when I sell them, or do I just pay US capital gains?
Here is my real question. I am a US resident. I gained Santander CDI shares (listed on the London Stock Exchange) via Abbey National, which became a bank, which then got bought by Santander. The shares are held in my US trading account. I am planning on selling the shares but i have read some stuff about having to file a spanish 210 tax form. Do I have to do that? I am not a spanish resident and have never lived or worked in spain.