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?

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.