Hi aspirant, since you have 345 marks in your NEET exam so accordingly your rank will lie under 651-750, on behalf of that below are  some of the top colleges in which you can get in;

• King George's Medical University, Lucknow
• Maulana Azad Medical College, New Delhi
• Vardhman Mahavir Medical College, New Delhi
• University College of Medical Sciences, New Delhi
• Annamalai University, Chidambaram
• Regional Institute of Medical Sciences, Imphal
• Kolkata Medical College, Kolkata
• Bangalore Medical College and Research Institute, Bangalore
• Government Medical College and Hospital, Chandigarh
• Gandhi Medical College, Secunderabad

Etc.

Also you can take below mentioned link to predict your future college by your own;

https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

Thank You.