Hi,

The minimum age limit to appear for the NEET exam according to the eligibility criteria is 17 years as on 31st December of the year of admission. As you will be 17 years old in the year 2021, you are eligible to give the NEET exam in 2021. There is no upper age limit to give the NEET exam.

You can check the eligibility criteria for NEET 2020 to get an idea:

https://medicine.careers360.com/articles/neet-eligibility-criteria

Hope this addresses