I am a US citizen and have had a Dutch residence permit (verblijfsverguning) for a year due to the fact that my domestic partner works in the Netherlands. All of my personal income was in the US and I will pay US taxes on it. I have not received an "invitation to pay taxes" here in the Netherlands. Should I file anyway? Also, if I have to file I may have to request an extension, as my US taxes will not be finished until May. What should I do?