A Business Analyst is a professional who has practical experience in sifting through huge chunks of business data to process meaningful insights that could support business decisions to propel growth or progress of a company that has hired him/her. Now, coming to your query on “How do you become a Business Analyst in the IT field”. Well, it's not only about gaining the required skills to become a Business Analyst, it takes much more than that, it needs constantly learning new streams and techniques, of Business Analytics, because at any given instant, new methods are flourishing changing the course of the Analytics game. So, apart from getting trained, you need to cultivate several soft skills like good communication, analytical and problem-solving skills, etc. to become a qualified and successful BA.
But to begin with, you need to acquire the required practical skillsets, to get an entry-level Business Analyst role. And for that, I would recommend you to enroll in a good-quality Business Analyst course online from Intellipaat. If you are just starting out then check out the Business Analyst training.