So, I live and work in the UK with my British husband, and have done for a couple years. I file my tax return in the US, but I don't pay anything on the money I earn over here, as the amount falls under the threshold. However, I have an elderly parent in not the best health, and need to spend some time with them in the US. I was planning on a two month trip, but will this cause me to owe taxes on my UK income because I'll be in America too long? Can anything be done about this? I know dishonesty is not good, but how do the powers that be know you're in the US? I lived in Saudi for a few years and they didn't ask for copies of passport stamps or anything like that when I filed as tax-exempt...just don't know what to do, and I really wish to spend some time with my sick parent but I don't want to have to write a big, fat check to the IRS. Any advice is very appreciated.