diff --git a/src/import-export/csv-imp/gnc-tx-import.cpp b/src/import-export/csv-imp/gnc-tx-import.cpp
index 87c788b560..ce9c5ef153 100644
--- a/src/import-export/csv-imp/gnc-tx-import.cpp
+++ b/src/import-export/csv-imp/gnc-tx-import.cpp
@@ -307,7 +307,8 @@ void GncTxImport::parse (bool guessColTypes)
     orig_lines.clear();
     for (auto tokenized_line : tokenizer->get_tokens())
     {
-        orig_lines.push_back (std::make_tuple (tokenized_line, std::string()));
+        orig_lines.push_back (std::make_tuple (tokenized_line, std::string(),
+                std::make_shared<GncPreTrans>(), std::make_shared<GncPreSplit>()));
         auto length = tokenized_line.size();
         if (length > max_cols)
             max_cols = length;
diff --git a/src/import-export/csv-imp/gnc-tx-import.hpp b/src/import-export/csv-imp/gnc-tx-import.hpp
index a3d88be679..6f9aed4f29 100644
--- a/src/import-export/csv-imp/gnc-tx-import.hpp
+++ b/src/import-export/csv-imp/gnc-tx-import.hpp
@@ -39,6 +39,7 @@ extern "C" {
 #include <vector>
 #include <map>
 #include <memory>
+#include <boost/optional.hpp>
 
 #include "gnc-tokenizer.hpp"
 
@@ -93,8 +94,34 @@ extern const gchar* currency_format_user[];
 extern const int num_date_formats;
 extern const gchar* date_format_user[];
 
-/** Tuple to hold a tokenized line of input and an optional error string */
-using parse_line_t = std::tuple<StrVec, std::string>;
+struct GncPreTrans
+{
+    boost::optional<time64> m_date;
+    boost::optional<std::string> m_num;
+    boost::optional<std::string> m_desc;
+    boost::optional<std::string> m_notes;
+};
+
+struct GncPreSplit
+{
+    boost::optional<Account*> m_account;
+    boost::optional<gnc_numeric> m_deposit;
+    boost::optional<gnc_numeric> m_withdrawal;
+    boost::optional<gnc_numeric> m_balance;
+    boost::optional<std::string> m_memo;
+    boost::optional<Account*> m_oaccount;
+    boost::optional<std::string> m_omemo;
+};
+
+/** Tuple to hold
+ *  - a tokenized line of input
+ *  - an optional error string
+ *  - a struct to hold user selected properties for a transaction
+ *  - a struct to hold user selected properties for one or two splits in the above transaction */
+using parse_line_t = std::tuple<StrVec,
+                                std::string,
+                                std::shared_ptr<GncPreTrans>,
+                                std::shared_ptr<GncPreSplit>>;
 
 /** The actual TxImport class
  * It's intended to use in the following sequence of actions: