im starting to fill the i130 for my parents they are in usa as a tourist visa will i have to fill the i485 for both, or should i fill one for each?

Whether you file the I-485 petitions depends upon your intent and that of your parents. If they wish to return overseas soon, you would file separate I-130 petitions for them, and they would consular process their immigration later on forms DS-260 Application for Immigrant Visa with the National Visa Center after the I-130 petitions are approved, and interview for the immigrant visas at the designated embassy or consulate in their home country. If you and your parents decide that they should remain in the US, you can file concurrent I-130 petitions (one for each parent) along with I-485 applications (again, one for each parent). Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (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.