Missing purchase history from Cryptopia and Liqui

Describe the problem:
My report for the current financial year is showing that I still hold on to various cryptocurrency assets even after importing all my data from APIs. I previously sold these assets on two exchanges (Cryptopia and Liqui) however I am unable to access and import my trade history to show this because Cryptopia and Liqui are now closed. How do I resolve this? Ideally I want to show that I have sold these assets and no longer hold on to them.

Which exchange/wallet is this regarding?
Cryptopia and Liqui

How did you import data into this wallet?
Unable to import data

What have you tried to fix this so far?
N/A

Hi, you can find the transfers from your other wallets to Cryptopia/Liqui and mark them as Lost or change them to trades for zero USD.