Eligibility criteria..

Hi Tanya, As per your query about the eligibility for NEET UG, i would like to inform that you have to complete 17 yrs by 31st december 2018 for applying in NEET UG 2018... IF this criteria is not fulfilled then you won't be able to apply for the exam...
Regards
Dr Parmanand Agarwal
MBBS MD
Career counselor

Quoting what is written in the neet Ug 2018 exam broucher.Have a look and decide

You will have to satisfy 3 standards initially.

(i) Age Limit

Minimum Age: individual applying must be at least 17 years old as on or before 31st December of 2018.Maximum Age: individual applying must be less than 25 years (for unreserved candidates) and 30 years (for SC, ST, OBC).

(ii) Nationality Conditions

Nationality: Applicant must be Indian National or Non Resident Indians (NRIs), Oversees Citizen of India (OCIs), Persons of Indian Origin (PIOs), Foreign National.J&K/AP/Telangana: NEET 2018 aspirants from J&K/AP/Telangana shall be entitled to an All India 15% quota only if they submit self-declaration.Aadhaar Card Requirement: Indian Nationals must produce Aadhaar Number details and fill the 18 digit number in the space while filling the application form.

(iii) Qualification

Examination: a 12th class qualification or equivalent is essential.Subjects: Subjects studied at 12th class level should include Chemistry, Physics, Biology/Biotechnology with English.10+2 appearing- students going to appear in 12th are also eligible to apply.Marks Requirement: In the qualifying exam (PCB group), candidate should have obtained at least 50% marks for GEN, whereas for general-PH, the requirement is 45% marks while for SC/ST and OBC, the requirement is 40%.

Hey iam quoting down what is given in the neet 2018 eligibility broucher have a look if you fullfill them hurrah you are eligible for the exam

Homepage
NEET UG
NEET 2018  Application Form, Exam Date, Syllabus, Preparation Tips
ByAnwesha Bose-December 11, 2017
NEET 2018exam date is by 10th May 2018. It is conducted by CBSE. MoHFW has directed CBSE to conduct NEET 2018 by 10th May 2018 and announce result by first week of June 2018. Exam date of National Eligibility Entrance Test (NEET) UG 2018 shall be decided by the board. It is the single common medical entrance exam for MBBS and BDS admission in medical and dental colleges in India approved by MCI/DCI. Latest news is that CBSE is making preparations to conduct NEET UG 2018. Question papers of NEET will be uniform for all languages. Also that NEET 2018 application form is expected to be issued in December 2017 or January 2018. Students who fulfill eligibility criteria can apply online at cbseneet.nic.in. Get here complete details of NEET 2018 such as application form, dates, syllabus, exam pattern, eligibility, admit card, result.
Date of NEET 2018is expected to be the first Sunday of May 2018. Medical institutions approved by MCI, DCI shall have to consider NEET 2018 for providing admission in MBBS/BDS courses.It will be single stage objective type test. Candidate has to submit online application form to appear in exam, and participate in counselling with a valid NEET 2018 result score.
NEET 2018
Latest  Minutes of meeting of officials reveal exam date possibility and confirmed dates of counselling, see image below. CBSE will soon announce NEET 2018 exam date. Minutes of meeting of MoHFW indicate that NEET 2018 exam date has to be on or before May 10, 2018. CBSE is expected to announce the date through a official notification in Dec 2017 / Jan 2018. Application form for NEET 2018 will also be available then.Check here.
Admission to undergraduate medical and dental programs will be on basis of CBSE NEET UG 2018. Aspirants are looking forward to knowing date of exam.
The medical entrance exam is held on the first Sunday in the month of May every year. The first Sunday of May 2018 happens to be 6 May 2018. Hence it is likely that NEET 2018 exam date could be Sunday, 6 May 2018.
Expected CBSE NEET UG 2018 Exam Dates
The dates that we have mentioned have been mentioned based on the data from previous years. As soon as the NEET 2018 schedule is available we shall update this page.
EventTentative datesApplication form submission in online mode begins3rd week of December 2017Application form submission in online mode ends4th week of January 2018Final dates for submitting the application feeLast week of January 2018Admit Card issue dates1st week of April 2018Entrance Exam to be conducted on as per newsby 10 May 2018Result declaration possible dates1st week of June 2018First round of counselling for AIQ, Deemed, CI12 Jun 2018  24 Jun 2018Last date of joining after first round of counselling for AIQ, Deemed, CI03 Jul 2018First round of state counselling25 Jun 2018  05 Jul 2018Last date of joining after first round of state counselling12 Jul 2018Second round of counselling for AIQ, Deemed, CI06 Jul 2018  12 Jul 2018Last date of joining after second round of counselling for AIQ, Deemed, CI22 Jul 2018Second round of state counselling15 Jul 2018  26 Jul 2018Last date of joining after second round of state counselling03 Aug 2018Mop up round of counselling for state04 Aug 2018  08 Aug 2018Last date of joining after mop up round in state12 Aug 2018Forwarding list of students in orer of merit, equalling to ten times the number of vacant seats to the medical colleges by the counselling authority for state13 Aug 2018Mop up round of counselling for Deemed, CI12 Aug 2018  22 Aug 2018Last date of joining after mop up round in deemed, CI26 Aug 2018Forwarding list of students in orer of merit, equalling to ten times the number of vacant seats to the medical colleges by the counselling authority for deemed, CI27 Aug 2018Last date of joining in state18 Aug 2018Last date of joining in deemed, CI31 Aug 2018
CBSENEET UG 2018 Quick Links
Important DatesNumber of attempts for NEET UGAge LimitApplication FormAdmit CardAnswer KeyResultCut Off
Exam date of CBSE NEET UG 2018 to be by 10th May 2018
NEET UG 2018 confirmed, will be a single window exam for MBBS/BDS admission to 100% seats
It is usually the norm for CBSE to send out consent to act as an observer notices to various universities before conducting NEET UG. This notice requests universities to submit names of members who can act as observers.
Through that notice, it confirms that NEET UG 2018 will be conducted. It will be a single window examination (there will be exam on a single day in a single window).
CBSE is making preparation for the conduct of NEET 2018 examination. The schedule of the same will be shortly finalized and communicated to all concerned through various communication modes.
The NEET exam is for admission to MBBS/BDS courses throughout the country for 100% seats.
You can read the key part of the said notice below.
CBSENEET UG 2018 Eligibility Criteria You will have to satisfy 3 standards initially.
(i) Age Limit
Minimum Age: individual applying must be at least 17 years old as on or before 31st December of 2018.Maximum Age: individual applying must be less than 25 years (for unreserved candidates) and 30 years (for SC, ST, OBC).
(ii) Nationality Conditions
Nationality: Applicant must be Indian National or Non Resident Indians (NRIs), Oversees Citizen of India (OCIs), Persons of Indian Origin (PIOs), Foreign National.J&K/AP/Telangana: NEET 2018 aspirants from J&K/AP/Telangana shall be entitled to an All India 15% quota only if they submit self-decla

Dear Tanya
As per your query and the age you've mentioned you're not eligible to take exam but if you want to take sample tests.  Please click here
If you are willing to take tests.
All the best.

Are you asking for NEET, If yes then you are not eligble and also you have only three attempts in the exam also from 2017.

Please explain your clear exam name & also your date of birth. Accordingly I can help you more.