Deductions & credits

Thanks for your help!

I am a USA citizen,

working in Ireland. All my income was from an Ireland college and I have been there all of 2022 and 2023 so far.

If I don't take the forgien income exclusion, my Tubo tax says I will get like $3,000 in child tax credit.

But not sure of my income counts if none is from any USA entity or if it is legal to not take the exclusion?