President Trump announced that his administration will send letters to trading partners within the next 2-3 weeks outlining tariff rates for doing business with the US. Trump claims there are too many countries (around 150) wanting trade deals for his team to meet with individually.
While some priority countries like Japan, South Korea, India, and the EU are still in negotiations, most nations will simply receive notification of their rates, with some appeal option available. Trump has already reached agreements with the UK and temporarily with China to allow for further discussions.