At the time that a person formally renounces their US citizenship, they will have to submit several Department of State (DS) Forms.
These are known as Department of State forms and they can generally be found on the Department of State website, forms 4079-4083.
These are not tax forms but rather immigration-type forms about why a person wants to give up their US citizenship.
You will have to file a final Form 1040 tax return for the year that they renounced.
Accompanying Form 1040 may be several other US tax forms as well,
- such as a Form 1040-NR for the portion of the year that they are a non-US person,
- a Form 8854 which is the expatriation statement, and
- possibly a sailing permit.
- This will include all world income, not just the US income.
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