To check the status of your green card, you will need to go to the USCIS website. You will need to log in and click on After I File in the navigation area on the left hand side of the page. From there you can click on Check My Case Status. Then in the appropriate field, you enter the 13 digit receipt number and then click Check Status. You can also check the status by calling the National Service Center. The phone number is (800) 375-5283. You will also need the receipt number.