diff --git a/l10n_us_ca_hr_payroll/__manifest__.py b/l10n_us_ca_hr_payroll/__manifest__.py
index b4dd1c3a..eeeeb590 100755
--- a/l10n_us_ca_hr_payroll/__manifest__.py
+++ b/l10n_us_ca_hr_payroll/__manifest__.py
@@ -28,5 +28,5 @@ USA::California Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_fl_hr_payroll/__manifest__.py b/l10n_us_fl_hr_payroll/__manifest__.py
index 4c1312d4..354fdc7d 100755
--- a/l10n_us_fl_hr_payroll/__manifest__.py
+++ b/l10n_us_fl_hr_payroll/__manifest__.py
@@ -23,5 +23,5 @@ USA::Florida Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_hr_payroll/migrations/12.0.2020.1.0/post-migration.py b/l10n_us_hr_payroll/migrations/12.0.2020.1.0/post-migration.py
new file mode 100644
index 00000000..752751db
--- /dev/null
+++ b/l10n_us_hr_payroll/migrations/12.0.2020.1.0/post-migration.py
@@ -0,0 +1,52 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from odoo.addons.l10n_us_hr_payroll.migrations.data import FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020
+from odoo.addons.l10n_us_hr_payroll.migrations.helper import field_exists, \
+                                                             temp_field_exists, \
+                                                             remove_temp_field, \
+                                                             temp_field_values
+
+
+from odoo import SUPERUSER_ID
+from odoo.api import Environment
+
+
+import logging
+_logger = logging.getLogger(__name__)
+
+
+def migrate(cr, installed_version):
+    fields_to_move = [f for f in FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020 if temp_field_exists(cr, 'hr_contract', f)]
+    if not fields_to_move:
+        _logger.warn(' migration aborted because no temporary fields exist...')
+        return
+
+    env = Environment(cr, SUPERUSER_ID, {})
+    new_structure = env.ref('l10n_us_hr_payroll.structure_type_employee')
+
+    # We will assume all contracts without a struct (because we deleted it), or with one like US_xx_EMP, need config
+    contracts = env['hr.contract'].search([
+        '|',
+        ('struct_id', '=', False),
+        ('struct_id.code', '=like', 'US_%'),
+    ])
+    _logger.warn('Migrating Contracts: ' + str(contracts))
+    for contract in contracts:
+        _logger.warn('Migrating contract: ' + str(contract) + ' for employee: ' + str(contract.employee_id))
+        # Could we somehow detect the state off of the current/orphaned salary structure?
+        old_struct_code = contract.struct_id.code
+        temp_values = temp_field_values(cr, 'hr_contract', contract.id, fields_to_move)
+        # Resolve mapping to the new field names.
+        values = {FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020[k]: v for k, v in temp_values.items()}
+        values.update({
+            'name': 'MIG: ' + str(contract.name),
+            'employee_id': contract.employee_id.id,
+        })
+        us_payroll_config = env['hr.contract.us_payroll_config'].create(values)
+        contract.write({
+            'struct_id': new_structure.id,
+            'us_payroll_config_id': us_payroll_config.id,
+        })
+
+    for field in fields_to_move:
+        remove_temp_field(cr, 'hr_contract', field)
diff --git a/l10n_us_hr_payroll/migrations/12.0.2020.1.0/pre-migration.py b/l10n_us_hr_payroll/migrations/12.0.2020.1.0/pre-migration.py
new file mode 100644
index 00000000..420181e4
--- /dev/null
+++ b/l10n_us_hr_payroll/migrations/12.0.2020.1.0/pre-migration.py
@@ -0,0 +1,29 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from odoo.addons.l10n_us_hr_payroll.migrations.data import FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020, \
+                                                           XMLIDS_TO_REMOVE_2020, \
+                                                           XMLIDS_TO_RENAME_2020
+from odoo.addons.l10n_us_hr_payroll.migrations.helper import field_exists, \
+                                                             temp_field_exists, \
+                                                             make_temp_field, \
+                                                             remove_xmlid, \
+                                                             rename_xmlid
+
+
+def migrate(cr, installed_version):
+    # Add temporary columns for all hr_contract fields that move to hr_contract_us_payroll_config
+    fields_to_move = [f for f in FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020 if field_exists(cr, 'hr_contract', f)]
+    # Prevent error if repeatedly running and already copied.
+    fields_to_move = [f for f in fields_to_move if not temp_field_exists(cr, 'hr_contract', f)]
+    for field in fields_to_move:
+        make_temp_field(cr, 'hr_contract', field)
+
+    # Need to migrate XMLIDs..
+    for xmlid in XMLIDS_TO_REMOVE_2020:
+        remove_xmlid(cr, xmlid)
+
+    for from_xmlid, to_xmlid in XMLIDS_TO_RENAME_2020.items():
+        rename_xmlid(cr, from_xmlid, to_xmlid)
+
+    # Need to remove views as they don't work anymore.
+    cr.execute("DELETE FROM ir_ui_view as v WHERE v.id in (SELECT t.res_id FROM ir_model_data as t WHERE t.model = 'ir.ui.view' and (t.module = 'l10n_us_hr_payroll' or t.module like 'l10n_us_%_hr_payroll'))")
diff --git a/l10n_us_hr_payroll/migrations/__init__.py b/l10n_us_hr_payroll/migrations/__init__.py
new file mode 100644
index 00000000..0358305d
--- /dev/null
+++ b/l10n_us_hr_payroll/migrations/__init__.py
@@ -0,0 +1 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
diff --git a/l10n_us_hr_payroll/migrations/data.py b/l10n_us_hr_payroll/migrations/data.py
new file mode 100644
index 00000000..25bb93d5
--- /dev/null
+++ b/l10n_us_hr_payroll/migrations/data.py
@@ -0,0 +1,47 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+FIELDS_CONTRACT_TO_US_PAYROLL_FORMS_2020 = {
+    # Federal
+    'w4_allowances': 'fed_941_fit_w4_allowances',
+    'w4_filing_status': 'fed_941_fit_w4_filing_status',
+    'w4_is_nonresident_alien': 'fed_941_fit_w4_is_nonresident_alien',
+    'w4_additional_withholding': 'fed_941_fit_w4_additional_withholding',
+    'fica_exempt': 'fed_941_fica_exempt',
+    'futa_type': 'fed_940_type',
+
+}
+
+XMLIDS_TO_REMOVE_2020 = [
+    # Federal
+    # Categories -- These are now all up in the EE FICA or ER FICA
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_m',
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_m_add',
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_m_add_wages',
+    'l10n_us_hr_payroll.hr_payroll_fica_comp_m',
+    'l10n_us_hr_payroll.hr_payroll_futa_wages',
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_m_wages',
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_ss_wages',
+    # Rules -- These are mainly Wage rules or were simplified to a single rule
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_ss_wages_2018',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_m_wages_2018',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_m_add_wages_2018',
+    'l10n_us_hr_payroll.hr_payroll_rules_futa_wages_2018',
+    'l10n_us_hr_payroll.hr_payroll_rules_fed_inc_withhold_2018_married',
+
+]
+
+XMLIDS_TO_RENAME_2020 = {
+    # Federal
+    'l10n_us_hr_payroll.hr_payroll_futa': 'l10n_us_hr_payroll.hr_payroll_category_er_fed_940',
+    'l10n_us_hr_payroll.hr_payroll_fica_emp_ss': 'l10n_us_hr_payroll.hr_payroll_category_ee_fed_941',
+    'l10n_us_hr_payroll.hr_payroll_fed_income_withhold': 'l10n_us_hr_payroll.hr_payroll_category_ee_fed_941_fit',
+    'l10n_us_hr_payroll.hr_payroll_fica_comp_ss': 'l10n_us_hr_payroll.hr_payroll_category_er_fed_941',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_ss_2018': 'l10n_us_hr_payroll.hr_payroll_rule_ee_fed_941_ss',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_m_2018': 'l10n_us_hr_payroll.hr_payroll_rule_ee_fed_941_m',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_emp_m_add_2018': 'l10n_us_hr_payroll.hr_payroll_rule_ee_fed_941_m_add',
+    'l10n_us_hr_payroll.hr_payroll_rules_futa_2018': 'l10n_us_hr_payroll.hr_payroll_rule_er_fed_940',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_comp_ss': 'l10n_us_hr_payroll.hr_payroll_rule_er_fed_941_ss',
+    'l10n_us_hr_payroll.hr_payroll_rules_fica_comp_m': 'l10n_us_hr_payroll.hr_payroll_rule_er_fed_941_m',
+    'l10n_us_hr_payroll.hr_payroll_rules_fed_inc_withhold_2018_single': 'l10n_us_hr_payroll.hr_payroll_rule_ee_fed_941_fit',
+
+}
diff --git a/l10n_us_hr_payroll/migrations/helper.py b/l10n_us_hr_payroll/migrations/helper.py
new file mode 100644
index 00000000..b41cf304
--- /dev/null
+++ b/l10n_us_hr_payroll/migrations/helper.py
@@ -0,0 +1,58 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+TMP_PREFIX = 'tmp_'
+
+"""
+Fields
+"""
+
+
+def field_exists(cr, table_name, field_name):
+    cr.execute('SELECT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name=%s and column_name=%s);', (table_name, field_name))
+    return cr.fetchone()[0]
+
+
+def temp_field_exists(cr, table_name, field_name):
+    tmp_field_name = TMP_PREFIX + field_name
+    cr.execute('SELECT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name=%s and column_name=%s);', (table_name, tmp_field_name))
+    return cr.fetchone()[0]
+
+
+def make_temp_field(cr, table_name, field_name):
+    tmp_field_name = TMP_PREFIX + field_name
+    cr.execute('SELECT data_type FROM information_schema.columns WHERE table_name=%s and column_name=%s;', (table_name, field_name))
+    tmp_field_type = cr.fetchone()[0]
+    cr.execute('ALTER TABLE ' + table_name + ' ADD ' + tmp_field_name + ' ' + tmp_field_type)
+    cr.execute('UPDATE ' + table_name + ' SET ' + tmp_field_name + '=' + field_name)
+
+
+def remove_temp_field(cr, table_name, field_name):
+    tmp_field_name = TMP_PREFIX + field_name
+    cr.execute('ALTER TABLE ' + table_name + ' DROP COLUMN ' + tmp_field_name)
+
+
+def temp_field_values(cr, table_name, id, field_names):
+    tmp_field_names = [TMP_PREFIX + f for f in field_names]
+    if not tmp_field_names:
+        return {}
+    cr.execute('SELECT ' + ', '.join(tmp_field_names) + ' FROM ' + table_name + ' WHERE id=' + str(id))
+    values = cr.dictfetchone()
+    if not values:
+        return {}
+    return {k.lstrip(TMP_PREFIX): v for k, v in values.items()}
+
+
+"""
+XMLIDs
+"""
+
+
+def remove_xmlid(cr, xmlid):
+    module, name = xmlid.split('.')
+    cr.execute('DELETE FROM ir_model_data WHERE module=%s and name=%s;', (module, name))
+
+
+def rename_xmlid(cr, from_xmlid, to_xmlid):
+    from_module, from_name = from_xmlid.split('.')
+    to_module, to_name = to_xmlid.split('.')
+    cr.execute('UPDATE ir_model_data SET module=%s, name=%s WHERE module=%s and name=%s;', (to_module, to_name, from_module, from_name))
diff --git a/l10n_us_mi_hr_payroll/__manifest__.py b/l10n_us_mi_hr_payroll/__manifest__.py
index 8411421f..4d453e71 100755
--- a/l10n_us_mi_hr_payroll/__manifest__.py
+++ b/l10n_us_mi_hr_payroll/__manifest__.py
@@ -24,5 +24,5 @@ USA::Michigan Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_mn_hr_payroll/__manifest__.py b/l10n_us_mn_hr_payroll/__manifest__.py
index 62583b61..37b784d1 100755
--- a/l10n_us_mn_hr_payroll/__manifest__.py
+++ b/l10n_us_mn_hr_payroll/__manifest__.py
@@ -23,5 +23,5 @@ USA - Minnesota Payroll Rules
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_mo_hr_payroll/__manifest__.py b/l10n_us_mo_hr_payroll/__manifest__.py
index 636d550e..061a58af 100755
--- a/l10n_us_mo_hr_payroll/__manifest__.py
+++ b/l10n_us_mo_hr_payroll/__manifest__.py
@@ -24,5 +24,5 @@ USA::Missouri Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_ms_hr_payroll/__manifest__.py b/l10n_us_ms_hr_payroll/__manifest__.py
index 8a370516..f5ad13a6 100755
--- a/l10n_us_ms_hr_payroll/__manifest__.py
+++ b/l10n_us_ms_hr_payroll/__manifest__.py
@@ -24,5 +24,5 @@ USA::Mississippi Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_mt_hr_payroll/__manifest__.py b/l10n_us_mt_hr_payroll/__manifest__.py
index 64883a44..3d8c7396 100755
--- a/l10n_us_mt_hr_payroll/__manifest__.py
+++ b/l10n_us_mt_hr_payroll/__manifest__.py
@@ -24,5 +24,5 @@ USA::Montana Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_nc_hr_payroll/__manifest__.py b/l10n_us_nc_hr_payroll/__manifest__.py
index 4960939c..26637bde 100755
--- a/l10n_us_nc_hr_payroll/__manifest__.py
+++ b/l10n_us_nc_hr_payroll/__manifest__.py
@@ -24,5 +24,5 @@ USA::North Carolina Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_nj_hr_payroll/__manifest__.py b/l10n_us_nj_hr_payroll/__manifest__.py
index d93a3b11..89584029 100755
--- a/l10n_us_nj_hr_payroll/__manifest__.py
+++ b/l10n_us_nj_hr_payroll/__manifest__.py
@@ -28,5 +28,5 @@ USA::New Jersey Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_oh_hr_payroll/__manifest__.py b/l10n_us_oh_hr_payroll/__manifest__.py
index ea602ecd..49fc01d2 100755
--- a/l10n_us_oh_hr_payroll/__manifest__.py
+++ b/l10n_us_oh_hr_payroll/__manifest__.py
@@ -25,5 +25,5 @@ USA::Ohio Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_pa_hr_payroll/__manifest__.py b/l10n_us_pa_hr_payroll/__manifest__.py
index 3f124969..0cec3566 100755
--- a/l10n_us_pa_hr_payroll/__manifest__.py
+++ b/l10n_us_pa_hr_payroll/__manifest__.py
@@ -25,5 +25,5 @@ USA::Pennsylvania Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_tx_hr_payroll/__manifest__.py b/l10n_us_tx_hr_payroll/__manifest__.py
index fbc60187..650444a3 100755
--- a/l10n_us_tx_hr_payroll/__manifest__.py
+++ b/l10n_us_tx_hr_payroll/__manifest__.py
@@ -25,5 +25,5 @@ USA::Texas Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }
diff --git a/l10n_us_wa_hr_payroll/__manifest__.py b/l10n_us_wa_hr_payroll/__manifest__.py
index 2fc72921..f20702be 100755
--- a/l10n_us_wa_hr_payroll/__manifest__.py
+++ b/l10n_us_wa_hr_payroll/__manifest__.py
@@ -25,5 +25,5 @@ USA::Washington Payroll Rules.
         'data/rules.xml',
         'data/final.xml',
     ],
-    'installable': True
+    'installable': False
 }