Starting April 2, 2018, USCIS will begin accepting H-1B petitions subject to the Fiscal Year (FY) 2019 cap. We will temporarily suspend premium processing for all FY 2019 cap-subject petitions, including petitions seeking an exemption for individuals with a U.S. master’s degree or higher. This suspension is expected to last until Sept. 10, 2018. During this time, we will continue to accept premium processing requests for H-1B petitions that are not subject to the FY 2019 cap. We will notify the public before resuming premium processing for cap-subject H-1B petitions or making any other premium processing updates.
(https://www.uscis.gov/news/alerts/uscis-will-temporarily-suspend-premium-processing-fiscal-year-2019-h-1b-cap-petitions)