diff --git a/htdocs/core/tpl/objectline_create.tpl.php b/htdocs/core/tpl/objectline_create.tpl.php
index 5974daa0573..51ae07640e6 100644
--- a/htdocs/core/tpl/objectline_create.tpl.php
+++ b/htdocs/core/tpl/objectline_create.tpl.php
@@ -761,7 +761,7 @@ if (!empty($usemargins) && $user->rights->margins->creer) {
 							jQuery('#date_end').removeClass('inputmandatory');
 						}
 
-						if (<?php echo (int) $inputalsopricewithtax; ?> == 1 && data.pricebasetype == 'TTC') {
+						if (<?php echo (int) $inputalsopricewithtax; ?> == 1 && data.pricebasetype == 'TTC' && <?php print getDolGlobalInt('MAIN_NO_INPUT_PRICE_WITH_TAX') ? 'false' : 'true'; ?>) {
 							console.log("objectline_create.tpl set content of price_ttc");
 							jQuery("#price_ttc").val(data.price_ttc);
 						} else {
diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index 39c6128435b..8478e5279a8 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -219,7 +219,7 @@ if (!defined('NOREQUIREDB') && !defined('NOREQUIRESOC')) {
 		$conf->global->MAIN_PROFID1_IN_ADDRESS = 1;
 	}
 
-	if ($mysoc->localtax1_assuj || $mysoc->localtax2_assuj) {
+	if (($mysoc->localtax1_assuj || $mysoc->localtax2_assuj) && !isset($conf->global->MAIN_NO_INPUT_PRICE_WITH_TAX)) {
 		// For countries using the 2nd or 3rd tax, we disable input/edit of lines using the price including tax (because 2nb and 3rd tax not yet taken into account).
 		// Work In Progress to support all taxes into unit price entry when MAIN_UNIT_PRICE_WITH_TAX_IS_FOR_ALL_TAXES is set.
 		$conf->global->MAIN_NO_INPUT_PRICE_WITH_TAX = 1;