diff --git a/postgres/ynab-import.go b/postgres/ynab-import.go
index 8aa512b..fd5f173 100644
--- a/postgres/ynab-import.go
+++ b/postgres/ynab-import.go
@@ -116,7 +116,9 @@ type Transfer struct {
 	ToAccount         string
 }
 
-// ImportTransactions expects a TSV-file as exported by YNAB.
+// ImportTransactions expects a TSV-file as exported by YNAB in the following format:
+// "Account"	"Flag"	"Date"	"Payee"	"Category Group/Category"	"Category Group"	"Category"	"Memo"	"Outflow"	"Inflow"	"Cleared"
+// "Cash"	""	"11.12.2021"	"Transfer : Checking"	""	""	""	"Brought to bank"	500,00€	0,00€	"Cleared"
 func (ynab *YNABImport) ImportTransactions(context context.Context, r io.Reader) error {
 	csv := csv.NewReader(r)
 	csv.Comma = '\t'