I have written date by hand below my photograph in neet application form do I have to stick a hard copy of that photo on Hall ticket ?

The reason it is preferred to have the same photo on your admit card that you have used in the application form is because it makes it easier for identification. The date on the photograph on the Admit card is not mandatory. So you can use the same photograph and even if there is no date, it is still valid. The reason why they want you to have date on the photograph in the application form is to make sure it is the latest one. But when you affix the same photo on the admit card, because you will be present in person, identification becomes much easier. So dont need to mention date on the admit card photograph.