B1/B2 - I94 Extension -Check List

Hi Anil,
Thanks in advance for your service. I am filing I-539 for my in-laws to extend their I94 . I couldn’t find checklist what I need to attach along with I-539 & I-539 A.
I would really appreciate , if your can respond to below questions

  1. May I know what address I need to write on the check.
  2. Check list
  3. USCIS mailing address for USPS courier


Read here:

Thank you so much for your prompt response