Shiba Inu Token (SHIBUSD)

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Thank you so very much for your help, It looks like you've sent me to the right place. I've been going through different tabs, but it won't give me the answer.
I don't even remember the dates, details of my purchases or the prices. I guess transferring from one coinbasePro to coinbase advance is considered as if the asset came from outside coinbase? I'm still clicking to find out. I don't understand where they came up with $771 cost basis, should be $5,000, maybe when they transferred my account that's how much SHIB my shares were worth? I'll have to call or send them an email.

Here's what it says.
Add missing transaction details
When you send or receive crypto outside Coinbase, we don't know your acquiring date, cost basis (purchase price), or reason for sending or receiving. Please add these details for the transactions below, so your gains/losses are accurately calculated. Learn More

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Modified
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Received 84700000 SHIB
11/29/2022
?
Reason for transaction
I received a transfer from myself
Amount
84700000
Date acquired
Total cost basis
771.19
Sending crypto to yourself
Sending crypto from a wallet you own to Coinbase is not a taxable event. But we’ll need the date acquired and cost basis to accurately calculate your gains/losses when you sell.

Again thank you so much @xxxx