First, get a journal and write down your thoughts on how you perceive and interact with the world around you. Consider how you make decisions, what motivates you, and how you tend to approach challenges. In particular, think about how you use your senses to take in information and how you rely on intuition or logic to make decisions. Then, look for patterns in your behavior and preferences that can help you identify your personality type based on the four dichotomies used in the MBTI: extraversion vs. introversion, sensing vs. intuition, thinking vs. feeling, and judging vs. perceiving.
As you reflect on your behavior and preferences, consider how you use each of the eight psychological functions described by the MBTI: extraverted sensing, introverted sensing, extraverted intuition, introverted intuition, extraverted thinking, introverted thinking, extraverted feeling, and introverted feeling. Think about how you use each of these functions in your everyday life and how they interact with each other. By studying yourself and how you work, you can determine which functions you use most frequently and in what contexts, which can help you identify your personality type. Additionally, you can look for information on the 16 personality types described by the MBTI and see which one resonates with you the most based on the patterns you've observed in your own behavior. By taking the time to reflect on your behavior and preferences, you can accurately determine your Myers-Briggs Type Indicator without relying on an online test.