The U.S. Embassy in your country of origin will provide you with the necessary information once the USCIS has accepted the waiver. The applicant will be given instructions on how to schedule a new interview time at the embassy or consulate.
After receiving the I-601A approval notice from USCIS, the consulate typically forwards the information to the applicant via DHL. In most cases, this occurs 1-2 days after USCIS approval. If the packet has not arrived within 30 days, contact the consulate.