April is filled with momentous turns in long-running tech policy stories, some possibly industry-changing.Important events coming up in April include TikTok's sell-by deadline, new tariffs, and juggernaut antitrust cases involving Apple and Meta.Tariffs are set to be announced on April 2nd, and the tech industry faces challenges despite cozying up to President Trump.The coming weeks in April could be extraordinarily busy and bring significant changes to the tech industry.