The latest developments related to राज्यसभा चुनाव are that elections for 37 seats in the Rajya Sabha are scheduled to take place. The evidence does not provide information on which states have vacant seats. It is mentioned that elections for 37 seats are to be held, but the specific states with vacant seats are not mentioned in the provided source. The source only mentions the number of seats up for election and does not provide further details on the vacant seats in different states. The Rajya Sabha elections are an important event in the Indian political landscape, and the elections for 37 seats are a significant development. However, without further information, it is not possible to determine which states have vacant seats. The source does not provide this specific detail.