I realized that on some previous years, I filed my taxes under the wrong status (I should have listed my online ESL teaching income as self-employed). So I need to file amended returns for those years because of social security. I use TurboTax, and was able to redo one return on their website but for any years prior to 2017, I can't use TurboTax online. I don't know what tax forms to use-- especially since they change from year to year.
Additionally, I DO live abroad (by my choice, not because of my job) and some years I never went back to the U.S., so I was wondering if my tax status changed during that period.
Any help would be appreciated. Thanks!