You will receive a file in .csv format. Within CoinLedger navigate to Import. Select Add Account then choose the Abra tab. Click on Upload File and drag your CSV file into the box to import your transactions.
Abra does not export complete transaction data for fiat purchases made on exchange (buying crypto with fiat currency.) The Transaction History file only includes the crypto amount received and does not include the fiat amount spent. As a result, CoinLedger imports these transactions as deposits (non-taxable self-transfers). Refer to this guide for instructions for how to edit the Deposit transaction and change it to a Fiat Buy.