You can download your onchain transaction history from any block explorer.
Here are the steps to download your transaction history on Etherscan:
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Go to Etherscan and enter in your wallet address.
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Scroll down to the bottom of the page and select “download: CSV Export”.
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Select the type of transactions you would like to download.
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Select the date range for the transactions you want to download.
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Check the reCAPTCHA box and then select “Download”.
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Once you select download, it will download to your device you will see a file title “export-” with your wallet address in it.