Hello!

You can get the OMR sheet in stationary shops or else you can even download the OMR sheet then take a printout of that and you can use that. For previous year NEET question papers. You can visit this link: https://medicine.careers360.com/articles/neet-question-paper

Apart from this if you want to practice more question which will help you to score better, you can make use of National test abhyas and embibe NEET mock series. By taking mocks you can analyse your statistics.

ALL THE BEST. Hope the answer was of some help.

Thank You