Hello,
I'm an American who has lived in Spain for the past 17 years, married to a Spaniard, and interested in the possibility of acquiring Spanish nationality.
Discussions in this site seem to confirm that although acquiring Spanish nationality requires a statement of renunciation of your US citizenship, the US doesn't consider it a valid renunciation.
There's a very important question, though, that I have not seen addressed anywhere, which is the following…
When preparing my annual Spanish tax declaration, and due to the bi-lateral tax treaty addressing double-taxation, I'm allowed a tax credit on taxes paid in the United States. What I wonder is, whether Spain would disallow that credit if I became a Spanish citizen, on the basis of, “You're no longer a US citizen and shouldn't be paying tax there.”
Do you have any insight into that? Thanks so much.