USCIS announced on July 30, 2018, that it has returned all fiscal year 2019 H-1B cap-subject petitions that were not selected in the computer-generated random selection process. USCIS previously announced on May 15, that it had completed data entry of all selected cap-subject petitions.
If you submitted an H-1B cap-subject petition that was delivered to USCIS between April 2 and April 6, 2018, and you have not received a receipt notice or a returned petition by August 13, you may contact USCIS for assistance.
Source: AILA Doc. No. 18073172.