N 400 addendum 2026

1. Click ‘Get Form’ to open the n 400 addendum in the editor.
2. Begin with Part 4, where you will provide information about your residence. Start by entering the 'Date of Residence From' in the specified format (mm/dd/yyyy).
3. Next, fill in your 'Street Number and Name', followed by the 'City', 'Province or Region', and 'County' if applicable. If you have a foreign address, ensure to include the relevant country and state.
4. Continue by entering the 'To' date of residence in the same format. Complete any additional fields such as 'Apt. Ste. Flr.', 'ZIP Code + 4', or 'Postal Code' for foreign addresses.
5. Repeat steps 2 through 4 for each subsequent section (6, 7, and 8) as required, ensuring all information is accurate and complete.
6. Finally, sign and date the form at the bottom of section 8 before submitting it.

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