Adding to the pressure: Florida has never passed a law to effectively collect sales tax on Internet purchases, so the state could lose even more revenue as the coronavirus pandemic prompts consumers, suddenly isolated in their homes, to shift more of their shopping online. Amazon.com Inc. said earlier this month that it plans to hire more than 100,000 warehouse and delivery workers to handle surging demand — yet approximately 60 percent of the Internet giant’s sales go essentially untaxed in Florida.