Now living in the UK, haven't received letters from the IRS this year. I didn't pay taxes in the UK, but need to ensure that I don't default in the US. Do I contact them?

I filed in the US for 16 years, anticipate returning there by the end of this year, but want to be proactive in filing if needed, even if there weren't any earnings, savings, no property, etc. I'm due to speak with an expat lawyer regarding double taxation next week, but was expecting to receive some sort of documentation from the IRS.