Exclude mined ETH

Describe the problem:
I have account on Binance, Coinbase and I also mined ETH last year (to MEW wallet).
In the middle of the year, I moved everything I bought from Coinbase to Binance and after it I moved my mined ETH to Coinbase (Pro), where I sold part of it.
The problem is, that cost basis shows that I solded part of bought ETH, that was moved to Binance, but I actually sold part o the mined ETH.
Is there any way I could set mined ETH be ignored?

Which exchange/wallet is this regarding?
Coinbase, Binance, MEW

How did you import data into this wallet?
API key

Hey, @Kluc

No, in short - unless you just delete all mined eth transactions from your account.

Koinly takes into account your cost-basis method when it determines which lot of ETH should be sold. So this is al dependent on the method itself.

This is down to accounting principles, and there is not much you can do to my knowledge to exclude this - maybe check in with an accountant?