I have not registerd for the selective service, and i am now 30 years old.

You are supposed to register by the age of 26 unless you were in the U. S. on a nonimmigrant basis. If not, you should wait until you turn the age of 31 before applying for citizenship as that would usually make the process smoother for a person in that situation. There may be a question of your good moral character associated with non-registration under selective service. The period of good moral character is 5 years, and so an individual who is 31 and who has no other bad marks against him in the past 5 years will have satisfied the requirement of good moral character for naturalization.Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.