First, complete online application. Second, wait for an online questionnaire/assessment. This typically takes 3 months or so. I suggest not to log off any time during the questionnaire/assessment process. Take your time during this part since there is no time limit. There will be a few accounting related questions. And there will be a few tax code related questions, nothing that should be too difficult if you have experience researching the tax code.

I attended a direct hiring career event for LB&I in April 2024. I was interviewed by a panel of 3 senior revenue agents, they asked me behavioral questions (tell me about a time when you faced a stressful situation, tell me about a time when you had to juggle multiple deadlines, etc.) and also questions on which tax forms I had experience with.