Hello!

I have lived and worked abroad since 2012. I have not filed since 2013 and need to file now for all years.

I did not file for 2013 but have worked from March 2013 in one local and in one international NGO. In 2016, I worked part of the year for an organization based in the U.S. while still living abroad.

I should qualify for foreign income exclusion for all years as I rarely visit home and my income never surpassed the thresholds set by the IRS.

Any tips on what I should and the best and least expensive way to file for all years? Hiring a CPA is not within my budget, unfortunately.

Thanks in advance!

Sometimes in life, you have to hire a professional. This is one of them. There are a number of factors that come into play here. Sorry this answer isn't more help than that.