diff --git a/plugins/local/bi_ort_ints/total_twoe_pot.irp.f b/plugins/local/bi_ort_ints/total_twoe_pot.irp.f
index 5e6a24e9..42a7ba62 100644
--- a/plugins/local/bi_ort_ints/total_twoe_pot.irp.f
+++ b/plugins/local/bi_ort_ints/total_twoe_pot.irp.f
@@ -176,6 +176,28 @@ BEGIN_PROVIDER [double precision, mo_bi_ortho_tc_two_e, (mo_num, mo_num, mo_num,
 
 END_PROVIDER 
 
+BEGIN_PROVIDER [ double precision, mo_bi_ortho_tc_two_e_transp, (mo_num, mo_num, mo_num, mo_num)]
+ implicit none
+ BEGIN_DOC
+  !
+  ! mo_bi_ortho_tc_two_e_transp(i,j,k,l) = <k l| V(r_12) |i j> = transpose of mo_bi_ortho_tc_two_e
+  !
+  ! the potential V(r_12) contains ALL TWO-E CONTRIBUTION OF THE TC-HAMILTONIAN
+  !
+ END_DOC
+
+ integer :: i,j,k,l
+ do i = 1, mo_num
+  do j = 1, mo_num
+   do k = 1, mo_num
+    do l = 1, mo_num
+     mo_bi_ortho_tc_two_e_transp(i,j,k,l) = mo_bi_ortho_tc_two_e_transp(k,l,i,j)
+    enddo
+   enddo
+  enddo
+ enddo
+
+END_PROVIDER 
 ! ---
 
  BEGIN_PROVIDER [ double precision, mo_bi_ortho_tc_two_e_jj,          (mo_num,mo_num)]
diff --git a/plugins/local/mo_localization/README.md b/plugins/local/mo_localization/README.md
index c28a5ee1..512e36af 100644
--- a/plugins/local/mo_localization/README.md
+++ b/plugins/local/mo_localization/README.md
@@ -3,7 +3,7 @@ To localize the MOs:
 ```
 qp run localization  
 ```
-By default, the different otbital classes are automatically set by splitting  
+By default, the different orbital classes are automatically set by splitting  
 the orbitales in the following classes:  
 - Core -> Core  
 - Active, doubly occupied -> Inactive  
diff --git a/plugins/local/tc_bi_ortho/normal_ordered.irp.f b/plugins/local/normal_order_old/normal_ordered.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/normal_ordered.irp.f
rename to plugins/local/normal_order_old/normal_ordered.irp.f
diff --git a/plugins/local/tc_bi_ortho/normal_ordered_contractions.irp.f b/plugins/local/normal_order_old/normal_ordered_contractions.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/normal_ordered_contractions.irp.f
rename to plugins/local/normal_order_old/normal_ordered_contractions.irp.f
diff --git a/plugins/local/tc_bi_ortho/normal_ordered_old.irp.f b/plugins/local/normal_order_old/normal_ordered_old.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/normal_ordered_old.irp.f
rename to plugins/local/normal_order_old/normal_ordered_old.irp.f
diff --git a/plugins/local/tc_bi_ortho/normal_ordered_v0.irp.f b/plugins/local/normal_order_old/normal_ordered_v0.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/normal_ordered_v0.irp.f
rename to plugins/local/normal_order_old/normal_ordered_v0.irp.f
diff --git a/plugins/local/tc_bi_ortho/h_biortho.irp.f b/plugins/local/slater_tc/h_biortho.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/h_biortho.irp.f
rename to plugins/local/slater_tc/h_biortho.irp.f
diff --git a/plugins/local/tc_bi_ortho/h_mat_triple.irp.f b/plugins/local/slater_tc/h_mat_triple.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/h_mat_triple.irp.f
rename to plugins/local/slater_tc/h_mat_triple.irp.f
diff --git a/plugins/local/tc_bi_ortho/h_tc_bi_ortho_psi.irp.f b/plugins/local/slater_tc/h_tc_bi_ortho_psi.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/h_tc_bi_ortho_psi.irp.f
rename to plugins/local/slater_tc/h_tc_bi_ortho_psi.irp.f
diff --git a/plugins/local/tc_bi_ortho/h_tc_s2_u0.irp.f b/plugins/local/slater_tc/h_tc_s2_u0.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/h_tc_s2_u0.irp.f
rename to plugins/local/slater_tc/h_tc_s2_u0.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_3e_slow.irp.f b/plugins/local/slater_tc/slater_tc_3e_slow.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_3e_slow.irp.f
rename to plugins/local/slater_tc/slater_tc_3e_slow.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_opt.irp.f b/plugins/local/slater_tc/slater_tc_opt.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_opt.irp.f
rename to plugins/local/slater_tc/slater_tc_opt.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_opt_diag.irp.f b/plugins/local/slater_tc/slater_tc_opt_diag.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_opt_diag.irp.f
rename to plugins/local/slater_tc/slater_tc_opt_diag.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_opt_double.irp.f b/plugins/local/slater_tc/slater_tc_opt_double.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_opt_double.irp.f
rename to plugins/local/slater_tc/slater_tc_opt_double.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_opt_single.irp.f b/plugins/local/slater_tc/slater_tc_opt_single.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_opt_single.irp.f
rename to plugins/local/slater_tc/slater_tc_opt_single.irp.f
diff --git a/plugins/local/tc_bi_ortho/slater_tc_slow.irp.f b/plugins/local/slater_tc/slater_tc_slow.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/slater_tc_slow.irp.f
rename to plugins/local/slater_tc/slater_tc_slow.irp.f
diff --git a/plugins/local/tc_bi_ortho/tc_hmat.irp.f b/plugins/local/slater_tc/tc_hmat.irp.f
similarity index 100%
rename from plugins/local/tc_bi_ortho/tc_hmat.irp.f
rename to plugins/local/slater_tc/tc_hmat.irp.f
diff --git a/plugins/local/tc_bi_ortho/NEED b/plugins/local/tc_bi_ortho/NEED
index 9a0c20ef..01841e02 100644
--- a/plugins/local/tc_bi_ortho/NEED
+++ b/plugins/local/tc_bi_ortho/NEED
@@ -1,6 +1,2 @@
-bi_ort_ints
-bi_ortho_mos
-tc_keywords
-non_hermit_dav
-dav_general_mat
 tc_scf
+slater_tc