when is the neet verification will be started in Karnataka 2021?

Hello aspirant!
Hope you are doing well.

Karnataka counseling has been started

The online registration window will be available up to December 17. The last date to pay the registration fee is December 18.
Document verification for Karnataka candidates will be conducted from December 20 to 23. For non-Karnataka candidates, the window for marks entry will be available from December 15 to 20.

Here is last year's cutoff of Karnataka
https://medicine.careers360.com/articles/neet-cutoff-karnataka

You can check your chances of admission by using college predictor tool
https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

Hope this helps you
All the best