Liqui shutdown - 1 transaction missing purchase history

Describe the problem:

Wallet: (
Transactions: 4
Imported with: CSV

  1. No airdrops/forks found
  2. No trades found
  3. 1 transactions are missing purchase history
    ---- Missing 7.80781206 ETH on 2017-12-03 12:45:05 UTC

The CSV has not included the trades that took place which explains the 7.8 Eth balance. How do I include this with no way of contacting the exchange?

Which exchange/wallet is this regarding?

How did you import data into this wallet?
From 2 CSV’s exported from their website - withdrawals + deposits

What have you tried to fix this so far?

I discovered the exchange is closed, not sure how to proceed.

You could make a transaction that turns all your remaining assets into ETH, this will give some cost to the ETH. However, your tax agency may not be so happy about this, so best to check with them on what to do when some data is missing.