In 2011, I left Block to go off on my own but couldn't hang a shingle in my county because of a no-compete, so I figured I could do some simple expat preparation services.
I helped a client with a simple return. He has 2 US children. He lives in a country where the tax rate was higher than as in the US, but I prepared the tax returns with the FEIE only.
We could have been using the FTC all of this time and missed claiming additional child tax credit of $2000 for
2011, 2012, 2013 ,2014, 2015, 2016, 2017
and $2800 for
2018, 2019, 2020
Given the filing dates, it looks like I can only amend 2018, 2019, and 2020.
I haven't faced anything like this before and I'm really bummed out. I'm not sure what to do.