@Philip Lu Hi There, Yes, You can use your virtual address (this will not be a problem with Mercury) BUT you must be able to receive hard copy mail at the virtual address as the IRS will send your EIN (147c) letter to you at the address you put on your form. Additionally, You will need this letter (EIN/147c letter) to open your Mercury bank account (they will ask you to upload it during your application session). I hope you find this information useful and let me know if you have any other questions or needed further clarification. Good Luck!