Hi aspirant,

It should not be a major problem during the verification process in neet counselling as the authorities mainly verify your 12th marksheet. However in order to avoid any type of inconvenience you are advised to carry a self attested affidavit claiming that a correction was made to the date of birth in the mark sheets and it is completely  in your acknowledgement. Also you must carry the supporting documents for the same.

In most cases the verification officer will accept the request and no problems will occur. Howeveryou must confirm it once to the officials of national testing agency by sending a email to the email I'd provided by them.

Hope it helps!!