It happens that people would like to provide more information than a standard Form N-400, Application for Naturalization, may include.
It most often concerns a travel, employment history, and the addresses a person used to live at. If the amount of information you want to provide is too much for the space provided on Form N-400, try to organise it in the way it could be fully included. Avoid being confusing when you present information as USCIS reacts to any confusion with a Request for Evidence or a rejection.
The instructions to the Form N-400 mention that any records that could not be included because of lack of space should be written on a separate sheet of paper. If you decided to attach another sheet of paper, ensure to write down an Alien registration number on every sheet. This attachment sheet must be put behind a fully completed form when you file it.