If you are importing a CSV file, try creating a new blank file with one header row with only the 5 key column labels (description, purchase date, sold date, proceeds, and cost basis) at the top. If you are using the file from the crypto exchange or aggregator, it may have something hidden or embedded in the header row that prevents it from importing.
Then copy and paste the data. Make sure it is saved as a *.csv file. If you have a large number of transactions, try breaking your data up into two smaller files.
You can use this link if you want to start a new thread as this one is from last year and is filled with unrelated or outdated info.
Importing Crypto with CSV file FAQ
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