@suzandrew , please tell me more about your exact situation ---- total foreign income, which country, foreign days during 2023, US /domestic income, filing status.
As I have mentioned above 1040 instructions shows the FEIE and tax computation thereof, but it should not result in very large change in tax liability. Also some credits may be disallowed based on the exact facts and circumstances.
Will circle back once I hear from you
pk
