从印出来的Document Cover Sheet （如下）来看，好像我可以自己到网上填那个Affidavit of Support表了，是吗？不是说他们会给我寄个package 3 才让交Affidavit of Support表和材料吗？有知道的请指点一下，我是干等着还是自己就在网上填表交材料呀？
After printing this cover sheet, the next step in the immigration process is for the Petitioner to follow the Affidavit of Support Processing Instructions. A link to the instructions has been provided for you on the Receipt Page. You can also access the instructions through www.ImmigrantVisas.state.gov
You MUST RETURN THIS COVER SHEET with the Petitioner's completed forms and supporting documents. Failure to do this may result in a delay in processing. Please attach this page to the front of the documents for this case and mail to: National Visa Center
谢谢了！