diff --git a/README.md b/README.md
index a42c7d3..7425dd3 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ Given an input CSV file reflecting the user's entire cryptocurrency transaction
 * compute gain or loss from the sale/exchange/disposal (including whether short-term or long-term)
 * record income for incoming transactions and expenses for outgoing transactions
 
+Read up on the [CSV input file](https://github.com/scoobybejesus/cryptools/blob/master/InputFile_CSV.md).
+
 Reports may be exported (as CSV files) that reflect income/expenses/gains/losses or amount and cost basis of existing holdings.
 
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