diff --git a/htdocs/core/modules/modTakePos.class.php b/htdocs/core/modules/modTakePos.class.php
index d34213f062c..5cb7a7f0c38 100644
--- a/htdocs/core/modules/modTakePos.class.php
+++ b/htdocs/core/modules/modTakePos.class.php
@@ -198,11 +198,25 @@ class modTakePos extends DolibarrModules
 
 		$r++;
 		$this->rights[$r][0] = 50151;
-		$this->rights[$r][1] = 'Use Point Of Sale';
+		$this->rights[$r][1] = 'Use Point Of Sale (record a sale, add products, record payment)';
 		$this->rights[$r][2] = 'a';
 		$this->rights[$r][3] = 0;
 		$this->rights[$r][4] = 'run';
 
+		$r++;
+		$this->rights[$r][0] = 50152;
+		$this->rights[$r][1] = 'Can modify added sales lines (prices, discount)';
+		$this->rights[$r][2] = 'a';
+		$this->rights[$r][3] = 0;
+		$this->rights[$r][4] = 'editlines';
+
+		$r++;
+		$this->rights[$r][0] = 50153;
+		$this->rights[$r][1] = 'Edit ordered sales lines (useful only when option "Order printers" has been enabled). Allow to edit sales lines even after the order has been printed';
+		$this->rights[$r][2] = 'a';
+		$this->rights[$r][3] = 0;
+		$this->rights[$r][4] = 'editorderedlines';
+
 
 		// Main menu entries
 		$this->menu = array(); // List of menus to add
diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index c03a3739d6a..c20a75b33b3 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -966,6 +966,8 @@ Permission23003=Delete Scheduled job
 Permission23004=Execute Scheduled job
 Permission50101=Use Point of Sale (SimplePOS)
 Permission50151=Use Point of Sale (TakePOS)
+Permission50152=Edit sales lines
+Permission50153=Edit ordered sales lines
 Permission50201=Read transactions
 Permission50202=Import transactions
 Permission50330=Read objects of Zapier
diff --git a/htdocs/takepos/invoice.php b/htdocs/takepos/invoice.php
index a4fc10c788a..6582ec96172 100644
--- a/htdocs/takepos/invoice.php
+++ b/htdocs/takepos/invoice.php
@@ -631,7 +631,8 @@ if ($action == "delete") {
 if ($action == "updateqty") {
 	foreach ($invoice->lines as $line) {
 		if ($line->id == $idline) {
-			$result = $invoice->updateline($line->id, $line->desc, $line->subprice, $number, $line->remise_percent, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'HT', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
+			if (!$user->rights->takepos->editlines || (!$user->rights->takepos->editorderedlines && $line->special_code == "4")) dol_htmloutput_errors($langs->trans("NotEnoughPermissions", "TakePos"), null, 1);
+			else $result = $invoice->updateline($line->id, $line->desc, $line->subprice, $number, $line->remise_percent, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'HT', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
 		}
 	}
 
@@ -653,7 +654,8 @@ if ($action == "updateprice") {
 			if ($usercanproductignorepricemin && (!empty($price_min) && (price2num($pu_ht) * (1 - price2num($line->remise_percent) / 100) < price2num($price_min)))) {
 				echo $langs->trans("CantBeLessThanMinPrice");
 			} else {
-				$result = $invoice->updateline($line->id, $line->desc, $number, $line->qty, $line->remise_percent, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'TTC', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
+				if (!$user->rights->takepos->editlines || (!$user->rights->takepos->editorderedlines && $line->special_code == "4")) dol_htmloutput_errors($langs->trans("NotEnoughPermissions", "TakePos"), null, 1);
+				else $result = $invoice->updateline($line->id, $line->desc, $number, $line->qty, $line->remise_percent, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'TTC', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
 			}
 		}
 	}
@@ -675,7 +677,8 @@ if ($action == "updatereduction") {
 			if ($usercanproductignorepricemin && (!empty($price_min) && (price2num($line->multicurrency_subprice) * (1 - price2num($number) / 100) < price2num($price_min)))) {
 				echo $langs->trans("CantBeLessThanMinPrice");
 			} else {
-				$result = $invoice->updateline($line->id, $line->desc, $line->multicurrency_subprice, $line->qty, $number, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'HT', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
+				if (!$user->rights->takepos->editlines || (!$user->rights->takepos->editorderedlines && $line->special_code == "4")) dol_htmloutput_errors($langs->trans("NotEnoughPermissions", "TakePos"), null, 1);
+				else $result = $invoice->updateline($line->id, $line->desc, $line->multicurrency_subprice, $line->qty, $number, $line->date_start, $line->date_end, $line->tva_tx, $line->localtax1_tx, $line->localtax2_tx, 'HT', $line->info_bits, $line->product_type, $line->fk_parent_line, 0, $line->fk_fournprice, $line->pa_ht, $line->label, $line->special_code, $line->array_options, $line->situation_percent, $line->fk_unit);
 			}
 		}
 	}