Yes, your income could affect your EFC and your financial aid. FAFSA’s student income formula will assess 1/2 of income over $6600 towards the student EFC and 20% of assets owned the day FAFSA is filed. Your 2019 income will be reported for the FAFSA for the 2021-22 school year. What you make next year, 2020 will be used for the 2022-2023 school year.
Any aid MIT offered you for the 2019-20 school year was based in part on your 2017 income. If you complete your gap year and start MIT next fall (2020-2021 school year) the financial aid will be based on 2018 parental and student incomes.