Currently Binance does not import VEN data via the API anymore, so before you can enter the swap, please download the VEN trades via the CSV:

To track the swap in CoinTracking you have to enter a trade from VEN to VET with the factor 1:100 (Buy VET - Sell VEN).
If you don't want a tax event to happen (gain or loss), it's important that you enter the asset value of the original costs of your VEN in this trade so that no profits or losses result.
You can find the cost of all your purchased VENs on the Gains page in Table 1 under "Cost". The asset values of the trade become visible when you edit the trade and click on Asset Value under Currency.
Example: If you owned 10 VEN, you will receive 1000 VET.