diff --git a/cd/test/cg0938.txt b/cd/test/cg0938.txt
index fea558a2c..4b9f0393c 100644
--- a/cd/test/cg0938.txt
+++ b/cd/test/cg0938.txt
@@ -3,5 +3,7 @@ cg5500c.msk
 cg5500b.msk
 
 Attivati acconto e interessi con ricalcolo nei trimestrali.
-
 Aggiunta 13 nei trimestrali e sistemata la visualizzazione dei trimestrali.
+Corrette diciture pro rata a da C1 C2 C3 C1a in B1 B2 B3 B4
+Calcolato il pro rata mensile sempre
+Detratti gli i beni ammortizzabili esenti venduti nel calcolo pro rata con numeratore e denominatore (da verificare)
diff --git a/cd/test/cg0938a.ini b/cd/test/cg0938a.ini
index c00fd2f30..a212d1920 100644
--- a/cd/test/cg0938a.ini
+++ b/cd/test/cg0938a.ini
@@ -9,80 +9,80 @@ Patch = 938
 Versione = 21511200
 
 [cg99]
-Kill(0) = batbzon.msk|x
-Kill(1) = bastdpn.rep|x
-Kill(2) = batbinl.msk|x
-Kill(3) = bastzon.msk|x
-Kill(4) = bastcve.rep|x
-Kill(5) = bastntb.rep|x
-Kill(6) = bastpdb.rep|x
-Kill(7) = bastnot.msk|x
-Kill(8) = batbarb.msk|x
-Kill(9) = batbnot.msk|x
-Kill(10) = batbcve.msk|x
-Kill(11) = cg2fppro.msk|x
-Kill(12) = bastmsp.rep|x
-Kill(13) = bastcco.msk|x
-Kill(14) = batbtra.msk|x
-Kill(15) = bastvet.msk|x
+Kill(0) = bastnot.rep|x
+Kill(1) = batbdel.msk|x
+Kill(2) = bastreg.msk|x
+Kill(3) = bastleg.msk|x
+Kill(4) = batbscc.msk|x
+Kill(5) = batbcam.msk|x
+Kill(6) = cgtbcon.msk|x
+Kill(7) = batbcco.msk|x
+Kill(8) = bastcve.msk|x
+Kill(9) = batbver.msk|x
+Kill(10) = bastvet.msk|x
+Kill(11) = bastesc.msk|x
+Kill(12) = batbtra.msk|x
+Kill(13) = batbind.msk|x
+Kill(14) = bastmsp.msk|x
+Kill(15) = batbesc.msk|x
 Kill(16) = batbleg.msk|x
-Kill(17) = bastmsp.msk|x
-Kill(18) = bastleg.msk|x
-Kill(19) = bastnot.rep|x
-Kill(20) = batbind.msk|x
-Kill(21) = bastesc.msk|x
-Kill(22) = bastpor.msk|x
-Kill(23) = batbesc.msk|x
-Kill(24) = batbscc.msk|x
-Kill(25) = batbdel.msk|x
-Kill(26) = bastcve.msk|x
-Kill(27) = cgtbcon.msk|x
-Kill(28) = batblia.msk|x
-Kill(29) = bastarb.rep|x
-Kill(30) = batbcam.msk|x
-Kill(31) = bastreg.msk|x
-Kill(32) = batbver.msk|x
-Kill(33) = batbcco.msk|x
-Kill(34) = batblbu.msk|x
-Kill(35) = bastcam.msk|x
-Kill(36) = bastdpn.msk|x
-Kill(37) = bastscc.msk|x
-Kill(38) = batbcfi.msk|x
+Kill(17) = bastpor.msk|x
+Kill(18) = cg2fppro.msk|x
+Kill(19) = batbcve.msk|x
+Kill(20) = bastcco.msk|x
+Kill(21) = bastmsp.rep|x
+Kill(22) = batbtit.msk|x
+Kill(23) = bastcfi.rep|x
+Kill(24) = bastivd.rep|x
+Kill(25) = bastreg.rep|x
+Kill(26) = bastscc.rep|x
+Kill(27) = bastzon.rep|x
+Kill(28) = bastleg.rep|x
+Kill(29) = bastndo.msk|x
+Kill(30) = batbivd.msk|x
+Kill(31) = bastvet.rep|x
+Kill(32) = bastcam.rep|x
+Kill(33) = batblia.msk|x
+Kill(34) = bastcfi.msk|x
+Kill(35) = batbpdb.msk|x
+Kill(36) = bastesc.rep|x
+Kill(37) = bastpor.rep|x
+Kill(38) = batbndo.msk|x
 Kill(39) = bastver.rep|x
-Kill(40) = batbntb.msk|x
-Kill(41) = bastntb.msk|x
-Kill(42) = batbreg.msk|x
-Kill(43) = bastver.msk|x
-Kill(44) = bastndo.rep|x
-Kill(45) = batbdpn.msk|x
-Kill(46) = batbvet.msk|x
-Kill(47) = batbpor.msk|x
-Kill(48) = bastcam.rep|x
-Kill(49) = bastndo.msk|x
-Kill(50) = batbins.msk|x
-Kill(51) = batbmsp.msk|x
-Kill(52) = bastpdb.msk|x
-Kill(53) = bastivd.msk|x
-Kill(54) = batblia.msk|x
-Kill(55) = batbivd.msk|x
-Kill(56) = bastpor.rep|x
-Kill(57) = batbpdb.msk|x
-Kill(58) = bastivd.rep|x
-Kill(59) = batbtit.msk|x
-Kill(60) = bastcfi.msk|x
-Kill(61) = bastvet.rep|x
-Kill(62) = batbndo.msk|x
-Kill(63) = bastesc.rep|x
-Kill(64) = bastreg.rep|x
-Kill(65) = bastcfi.rep|x
-Kill(66) = bastleg.rep|x
-Kill(67) = bastzon.rep|x
-Kill(68) = bastarb.msk|x
-Kill(69) = bastcco.rep|x
-Kill(70) = bastscc.rep|x
+Kill(40) = batbdpn.msk|x
+Kill(41) = batbmsp.msk|x
+Kill(42) = batbcfi.msk|x
+Kill(43) = bastndo.rep|x
+Kill(44) = batbins.msk|x
+Kill(45) = batbpor.msk|x
+Kill(46) = bastivd.msk|x
+Kill(47) = batbvet.msk|x
+Kill(48) = bastpdb.msk|x
+Kill(49) = bastarb.rep|x
+Kill(50) = bastcam.msk|x
+Kill(51) = bastntb.msk|x
+Kill(52) = batblia.msk|x
+Kill(53) = batblbu.msk|x
+Kill(54) = batbntb.msk|x
+Kill(55) = bastscc.msk|x
+Kill(56) = bastver.msk|x
+Kill(57) = bastdpn.msk|x
+Kill(58) = batbreg.msk|x
+Kill(59) = bastcco.rep|x
+Kill(60) = bastarb.msk|x
+Kill(61) = batbnot.msk|x
+Kill(62) = batbarb.msk|x
+Kill(63) = bastdpn.rep|x
+Kill(64) = batbzon.msk|x
+Kill(65) = bastntb.rep|x
+Kill(66) = bastcve.rep|x
+Kill(67) = bastzon.msk|x
+Kill(68) = batbinl.msk|x
+Kill(69) = bastnot.msk|x
+Kill(70) = bastpdb.rep|x
 
 [cg]
-Data = 31-01-2020
+Data = 10-02-2020
 Descrizione = Contabilita' Generale
 Dischi = 1
 Edit_19 = cg0 -0
diff --git a/cd/test/cg0938a1.zip b/cd/test/cg0938a1.zip
index 757348fde..64cdcf593 100644
Binary files a/cd/test/cg0938a1.zip and b/cd/test/cg0938a1.zip differ
diff --git a/cd/test/tf0938.txt b/cd/test/tf0938.txt
new file mode 100644
index 000000000..864884afd
--- /dev/null
+++ b/cd/test/tf0938.txt
@@ -0,0 +1,3 @@
+tf0.exe
+
+Corretto calcolo liquidazione IVA, data fine sbagliata se dicembre
diff --git a/cd/test/tf0938a.ini b/cd/test/tf0938a.ini
new file mode 100644
index 000000000..d20085e0c
--- /dev/null
+++ b/cd/test/tf0938a.ini
@@ -0,0 +1,19 @@
+[Main]
+Demo=0
+
+[tf1]
+File(0) = tf0.exe|X
+Patch = 0938
+Versione = 21511200
+
+[tf]
+Data = 10-02-2020
+Descrizione = Trasferimento fatture
+Dischi = 1
+Moduli = cg
+OEM = 
+Patch = 938
+PostProcess = 
+PreProcess = 
+Versione = 21511200
+
diff --git a/cd/test/tf0938a1.zip b/cd/test/tf0938a1.zip
new file mode 100644
index 000000000..fc0738d3b
Binary files /dev/null and b/cd/test/tf0938a1.zip differ
diff --git a/src/tf/tf0200.cpp b/src/tf/tf0200.cpp
index 076d0b4e5..9a3eb387b 100644
--- a/src/tf/tf0200.cpp
+++ b/src/tf/tf0200.cpp
@@ -486,7 +486,17 @@ void TCom_liq_per_iva_msk::extractinator() // Per gli amici GTFO
 	for(; start <= end; start++)
 	{
 		TDate data_da(1, start, anno);
-		TDate data_a(1, start + 1, anno); data_a.set_end_month();
+    TDate data_a;
+    if (start == 12)
+    {
+      data_a = TDate(1, 12, anno);
+      data_a.set_end_month();
+    }
+    else
+    {
+      data_a = TDate(1, start + 1, anno);
+      data_a.set_end_month();
+    }
 		bool has_ixc = gestione_IVAxCassa(data_da);
 
 		/****************************************************************************************************************
@@ -536,15 +546,17 @@ void TCom_liq_per_iva_msk::extractinator() // Per gli amici GTFO
 
 			if (tiporeg == iva_acquisti)
 			{
-				if ((!att_dt_comp || !((month_reg == start && (month_liq == 0 || month_liq == month_reg)) || start == month_liq))
-					&& (att_dt_comp || cur_iva.get(LF_MOV, MOV_DATAREG).as_date().month() == data_a.month()))
-					continue;
+        if ((start == 12 && month_reg != start) ||
+            (start != 12 && ((pas_dt_comp && month_reg != start && (month_liq == month_reg || month_liq == 0))
+                || (!pas_dt_comp && month_reg != start))))
+          continue;
 			}
 			else
 			{
-				if ((!pas_dt_comp || !((month_reg == start && (month_liq == 0 || month_liq == month_reg)) || start == month_liq))
-					&& (pas_dt_comp || cur_iva.get(LF_MOV, MOV_DATAREG).as_date().month() == data_a.month()))
-					continue;
+        if ((start == 12 && month_reg != start) ||
+            (start != 12 && ((att_dt_comp && month_reg != start && (month_liq == month_reg || month_liq == 0))
+                || (!att_dt_comp && month_reg != start))))
+          continue;
 			}
 
 			// Se è un movimento IvaXCassa o LiqDiff