Hi there. 

To be eligible for writing NEET one has to be between the age range of 17 years - 25 years (for general category) with 50% aggregate marks in Class XII boards with Physics, Chemistry, and Biology as the subjects. 

As you will turn 17 years of age by 2020 hence you'll be eligible to write the NEET examination provided you fulfil the whole eligibility criteria. 

For more relevant information on the eligibility criteria kindly refer to the following link: 

https://www.google.co.in/amp/s/medicine.careers360.com/articles/neet-eligibility-criteria/amp

Wishing you luck!