As of May 20, everyone taking an amateur radio license exam must provide examiners with their FCC Registration Number, or FRN, before taking the test. Current hams and other FCC licensees will already have one, but prospective amateurs must sign up for a number ahead of time. The process is simple: Go to the FCC's website at <https://tinyurl.com/njmmjjbv>, follow the prompts and fill out the form.
The ARRL notes that you will need this number after taking your test to log into the FCC website to print out your license, which the Commission no longer sends in the mail. In addition, as of June 29, all amateur applications will be required to include a valid e-mail address.