Crypto tax question

Describe the problem:
basically I’m using koinly to track my crypto/nfts for taxes. I used my brothers coinbase when I was 17 using my debit to buy SOL and transfer to my personal wallet and trade NFTs. After I turned 18 and transferred all my stuff to my newly made coinbase and my bank account. I have the transaction where my brother sent me the crypto; however, do I have to add the transaction where my brother bought the crypto? if so, how would I do that on koinly, since I can only have my “synced” wallets selected and I already have my own coinbase synced.

Which exchange/wallet is this regarding?
Coinbase

How did you import data into this wallet?
I tried to manually add a transaction(see below)

What have you tried to fix this so far?
I tried to manually add a transaction however it seems I have to sync my brothers coinbase to my koinly which I don’t want to do since I only used his coinbase to purchase SOL for myself and syncing his whole coinbase would also sync his personal transactions.

Hey, @user26488

You can get CSV files of the data from Coinbase and import them to your account. This way you dont need to setup an API connection.

You can also create a Coinbase wallet without using any data, then add manual transactions within that wallet.