diff --git a/line.py b/line.py
index 8e0f17f..9d65395 100644
--- a/line.py
+++ b/line.py
@@ -91,8 +91,7 @@ class Line(Workflow, ModelSQL, ModelView):
                 STATES['readonly'],
                 Eval('bookingtype', '').in_(['spin', 'spout']),
                 ),
-        }, depends=DEPENDS+['currency_digits', 'bookingtype'],
-        domain=[('amount', '>=', Decimal('0.0'))])
+        }, depends=DEPENDS+['currency_digits', 'bookingtype'])
     debit = fields.Numeric(string='Debit', digits=(16, Eval('currency_digits', 2)),
         required=True, readonly=True, depends=['currency_digits'])
     credit = fields.Numeric(string='Credit', digits=(16, Eval('currency_digits', 2)),
@@ -174,6 +173,13 @@ class Line(Workflow, ModelSQL, ModelView):
 
     #image = fields.Binary...
 
+    @classmethod
+    def __register__(cls, module_name):
+        super(Line, cls).__register__(module_name)
+
+        table = cls.__table_handler__(module_name)
+        table.drop_constraint('amount_val')
+
     @classmethod
     def __setup__(cls):
         super(Line, cls).__setup__()
@@ -184,9 +190,6 @@ class Line(Workflow, ModelSQL, ModelView):
             ('state_val',
                 Check(t, t.state.in_(['edit', 'check', 'done'])),
                 'cashbook.msg_line_wrong_state_value'),
-            ('amount_val',
-                Check(t, t.amount >= Decimal('0.0')),
-                'cashbook.msg_line_must_positive'),
             ])
         cls._transitions |= set((
                 ('edit', 'check'),
@@ -351,11 +354,10 @@ class Line(Workflow, ModelSQL, ModelView):
     def search_rec_name(cls, name, clause):
         """ search in description +...
         """
-        l1 = cls.search_payee(name, clause) + [
+        return cls.search_payee(name, clause) + [
             ('description',) + tuple(clause[1:]),
             ('category.rec_name',) + tuple(clause[1:]),
             ]
-        return l1
 
     def get_rec_name(self, name):
         """ short + name
diff --git a/locale/de.po b/locale/de.po
index 020d46f..e169b0f 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -150,10 +150,6 @@ msgctxt "model:ir.message,text:msg_line_invalid_category"
 msgid "The category of the booking line '%(recname)s' does not match the posting type '%(booktype)s'."
 msgstr "Die Kategorie der Buchungszeile '%(recname)s' paßt nicht zum Buchungstyp '%(booktype)s'."
 
-msgctxt "model:ir.message,text:msg_line_must_positive"
-msgid "The amount must be positive."
-msgstr "Der Betrag muß positiv sein."
-
 
 #############
 # res.group #
diff --git a/locale/en.po b/locale/en.po
index 49684f9..2dd8149 100644
--- a/locale/en.po
+++ b/locale/en.po
@@ -146,10 +146,6 @@ msgctxt "model:ir.message,text:msg_line_invalid_category"
 msgid "The category of the booking line '%(recname)s' does not match the posting type '%(booktype)s'."
 msgstr "The category of the booking line '%(recname)s' does not match the posting type '%(booktype)s'."
 
-msgctxt "model:ir.message,text:msg_line_must_positive"
-msgid "The amount must be positive."
-msgstr "The amount must be positive."
-
 msgctxt "model:res.group,name:group_cashbook"
 msgid "Cashbook"
 msgstr "Cashbook"
@@ -262,6 +258,10 @@ msgctxt "model:ir.ui.menu,name:act_category_view"
 msgid "Category"
 msgstr "Category"
 
+msgctxt "model:ir.ui.menu,name:menu_enter_booking"
+msgid "Enter Booking"
+msgstr "Enter Booking"
+
 msgctxt "model:ir.action,name:act_book_view"
 msgid "Cashbook"
 msgstr "Cashbook"
@@ -286,6 +286,10 @@ msgctxt "model:ir.action,name:act_wizard_report"
 msgid "Cashbook Report"
 msgstr "Cashbook Report"
 
+msgctxt "model:ir.action,name:act_enterbooking_wiz"
+msgid "Enter Booking"
+msgstr "Enter Booking"
+
 msgctxt "model:ir.action.act_window.domain,name:act_line_domain_current"
 msgid "Current Month"
 msgstr "Current Month"
@@ -922,6 +926,10 @@ msgctxt "model:cashbook.configuration,name:"
 msgid "Configuration"
 msgstr "Configuration"
 
+msgctxt "view:cashbook.configuration:"
+msgid "Enter Booking Wizard"
+msgstr "Enter Booking Wizard"
+
 msgctxt "view:cashbook.configuration:"
 msgid "Open Cashbook Wizard"
 msgstr "Open Cashbook Wizard"
@@ -930,6 +938,14 @@ msgctxt "view:cashbook.configuration:"
 msgid "Cashbook"
 msgstr "Cashbook"
 
+msgctxt "field:cashbook.configuration,defbook:"
+msgid "Default Cashbook"
+msgstr "Default Cashbook"
+
+msgctxt "help:cashbook.configuration,defbook:"
+msgid "The default cashbook is selected when you open the booking wizard."
+msgstr "The default cashbook is selected when you open the booking wizard."
+
 msgctxt "field:cashbook.configuration,date_from:"
 msgid "Start Date"
 msgstr "Start Date"
@@ -998,6 +1014,14 @@ msgctxt "help:cashbook.configuration_user,catnamelong:"
 msgid "Shows the long name of the category in the Category field of a cash book line."
 msgstr "Shows the long name of the category in the Category field of a cash book line."
 
+msgctxt "field:cashbook.configuration_user,defbook:"
+msgid "Default Cashbook"
+msgstr "Default Cashbook"
+
+msgctxt "help:cashbook.configuration_user,defbook:"
+msgid "The default cashbook is selected when you open the booking wizard."
+msgstr "The default cashbook is selected when you open the booking wizard."
+
 msgctxt "model:cashbook.recon,name:"
 msgid "Cashbook Reconciliation"
 msgstr "Cashbook Reconciliation"
@@ -1166,3 +1190,95 @@ msgctxt "report:cashbook.reprecon:"
 msgid "Total"
 msgstr "Total"
 
+msgctxt "report:cashbook.reprecon:"
+msgid "Payee"
+msgstr "Payee"
+
+msgctxt "model:cashbook.enterbooking.start,name:"
+msgid "Enter Booking"
+msgstr "Enter Booking"
+
+msgctxt "view:cashbook.enterbooking.start:"
+msgid "Description"
+msgstr "Description"
+
+msgctxt "view:cashbook.enterbooking.start:"
+msgid "Booking"
+msgstr "Booking"
+
+msgctxt "field:cashbook.enterbooking.start,cashbook:"
+msgid "Cashbook"
+msgstr "Cashbook"
+
+msgctxt "field:cashbook.enterbooking.start,cashbooks:"
+msgid "Cashbooks"
+msgstr "Cashbooks"
+
+msgctxt "field:cashbook.enterbooking.start,currency_digits:"
+msgid "Currency Digits"
+msgstr "Currency Digits"
+
+msgctxt "field:cashbook.enterbooking.start,currency:"
+msgid "Currency"
+msgstr "Currency"
+
+msgctxt "field:cashbook.enterbooking.start,bookingtype:"
+msgid "Type"
+msgstr "Type"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Revenue"
+msgstr "Revenue"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Revenue Splitbooking"
+msgstr "Revenue Splitbooking"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Expense"
+msgstr "Expense"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Expense Splitbooking"
+msgstr "Expense Splitbooking"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Transfer from"
+msgstr "Transfer from"
+
+msgctxt "selection:cashbook.enterbooking.start,bookingtype:"
+msgid "Transfer to"
+msgstr "Transfer to"
+
+msgctxt "field:cashbook.enterbooking.start,amount:"
+msgid "Amount"
+msgstr "Amount"
+
+msgctxt "field:cashbook.enterbooking.start,owner_cashbook:"
+msgid "Owner"
+msgstr "Owner"
+
+msgctxt "field:cashbook.enterbooking.start,category:"
+msgid "Category"
+msgstr "Category"
+
+msgctxt "field:cashbook.enterbooking.start,booktransf:"
+msgid "Source/Dest"
+msgstr "Source/Dest"
+
+msgctxt "field:cashbook.enterbooking.start,party:"
+msgid "Party"
+msgstr "Party"
+
+msgctxt "model:cashbook.enterbooking,name:"
+msgid "Enter Booking"
+msgstr "Enter Booking"
+
+msgctxt "wizard_button:cashbook.enterbooking,start,end:"
+msgid "Cancel"
+msgstr "Cancel"
+
+msgctxt "wizard_button:cashbook.enterbooking,start,save_:"
+msgid "Save"
+msgstr "Save"
+
diff --git a/message.xml b/message.xml
index 18ce400..8fea230 100644
--- a/message.xml
+++ b/message.xml
@@ -113,9 +113,6 @@ full copyright notices and license terms. -->
         <record model="ir.message" id="msg_line_invalid_category">
             <field name="text">The category of the booking line '%(recname)s' does not match the posting type '%(booktype)s'.</field>
         </record>
-        <record model="ir.message" id="msg_line_must_positive">
-            <field name="text">The amount must be positive.</field>
-        </record>
 
     </data>
 </tryton>
diff --git a/tests/test_line.py b/tests/test_line.py
index 32e175b..26de7bf 100644
--- a/tests/test_line.py
+++ b/tests/test_line.py
@@ -870,11 +870,25 @@ class LineTestCase(ModuleTestCase):
                     'bookingtype': 'mvout',
                     'amount': Decimal('1.0'),
                     'booktransf': book2.id,
+                }, {
+                    'date': date(2022, 6, 1),       # in-category, return
+                    'description': 'in-return',   # amount negative
+                    'category': category_in.id,
+                    'bookingtype': 'in',
+                    'amount': Decimal('-1.0'),
+                    'booktransf': book2.id,
+                }, {
+                    'date': date(2022, 6, 1),       # out-category, return
+                    'description': 'out-return',    # amount negative
+                    'category': category_out.id,
+                    'bookingtype': 'out',
+                    'amount': Decimal('-1.0'),
+                    'booktransf': book2.id,
                 }])],
             }])
         self.assertEqual(book.name, 'Book 1')
         self.assertEqual(book.state, 'open')
-        self.assertEqual(len(book.lines), 4)
+        self.assertEqual(len(book.lines), 6)
 
         self.assertEqual(book.lines[0].amount, Decimal('1.0'))
         self.assertEqual(book.lines[0].bookingtype, 'in')
@@ -901,6 +915,16 @@ class LineTestCase(ModuleTestCase):
         self.assertEqual(book.lines[3].credit, Decimal('0.0'))
         self.assertEqual(book.lines[3].debit, Decimal('1.0'))
 
+        self.assertEqual(book.lines[4].amount, Decimal('-1.0'))
+        self.assertEqual(book.lines[4].bookingtype, 'in')
+        self.assertEqual(book.lines[4].credit, Decimal('-1.0'))
+        self.assertEqual(book.lines[4].debit, Decimal('0.0'))
+
+        self.assertEqual(book.lines[5].amount, Decimal('-1.0'))
+        self.assertEqual(book.lines[5].bookingtype, 'out')
+        self.assertEqual(book.lines[5].credit, Decimal('0.0'))
+        self.assertEqual(book.lines[5].debit, Decimal('-1.0'))
+
         Line.write(*[
             [book.lines[0]],
             {