diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index 2ce0c7e..607b928 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -91,6 +91,9 @@
 	}
 
 	_calculate_taxes_and_totals() {
+		const is_quotation = this.frm.doc.doctype == "Quotation";
+		this.frm.doc._items = is_quotation ? this.filtered_items() : this.frm.doc.items;
+
 		this.validate_conversion_rate();
 		this.calculate_item_values();
 		this.initialize_taxes();
@@ -122,7 +125,7 @@
 	calculate_item_values() {
 		var me = this;
 		if (!this.discount_amount_applied) {
-			for (const item of this.frm.doc.items || []) {
+			for (const item of this.frm.doc._items || []) {
 				frappe.model.round_floats_in(item);
 				item.net_rate = item.rate;
 				item.qty = item.qty === undefined ? (me.frm.doc.is_return ? -1 : 1) : item.qty;
@@ -197,7 +200,7 @@
 		});
 		if(has_inclusive_tax==false) return;
 
-		$.each(me.frm.doc["items"] || [], function(n, item) {
+		$.each(me.frm.doc._items || [], function(n, item) {
 			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
 			var cumulated_tax_fraction = 0.0;
 			var total_inclusive_tax_amount_per_qty = 0;
@@ -268,7 +271,7 @@
 		var me = this;
 		this.frm.doc.total_qty = this.frm.doc.total = this.frm.doc.base_total = this.frm.doc.net_total = this.frm.doc.base_net_total = 0.0;
 
-		$.each(this.frm.doc["items"] || [], function(i, item) {
+		$.each(this.frm.doc._items || [], function(i, item) {
 			me.frm.doc.total += item.amount;
 			me.frm.doc.total_qty += item.qty;
 			me.frm.doc.base_total += item.base_amount;
@@ -321,7 +324,7 @@
 			}
 		});
 
-		$.each(this.frm.doc["items"] || [], function(n, item) {
+		$.each(this.frm.doc._items || [], function(n, item) {
 			var item_tax_map = me._load_item_tax_rate(item.item_tax_rate);
 			$.each(me.frm.doc["taxes"] || [], function(i, tax) {
 				// tax_amount represents the amount of tax for the current step
@@ -330,7 +333,7 @@
 				// Adjust divisional loss to the last item
 				if (tax.charge_type == "Actual") {
 					actual_tax_dict[tax.idx] -= current_tax_amount;
-					if (n == me.frm.doc["items"].length - 1) {
+					if (n == me.frm.doc._items.length - 1) {
 						current_tax_amount += actual_tax_dict[tax.idx];
 					}
 				}
@@ -367,7 +370,7 @@
 				}
 
 				// set precision in the last item iteration
-				if (n == me.frm.doc["items"].length - 1) {
+				if (n == me.frm.doc._items.length - 1) {
 					me.round_off_totals(tax);
 					me.set_in_company_currency(tax,
 						["tax_amount", "tax_amount_after_discount_amount"]);
@@ -590,10 +593,11 @@
 
 	_cleanup() {
 		this.frm.doc.base_in_words = this.frm.doc.in_words = "";
+		let items = this.frm.doc._items;
 
-		if(this.frm.doc["items"] && this.frm.doc["items"].length) {
-			if(!frappe.meta.get_docfield(this.frm.doc["items"][0].doctype, "item_tax_amount", this.frm.doctype)) {
-				$.each(this.frm.doc["items"] || [], function(i, item) {
+		if(items && items.length) {
+			if(!frappe.meta.get_docfield(items[0].doctype, "item_tax_amount", this.frm.doctype)) {
+				$.each(items || [], function(i, item) {
 					delete item["item_tax_amount"];
 				});
 			}
@@ -646,7 +650,7 @@
 			var net_total = 0;
 			// calculate item amount after Discount Amount
 			if (total_for_discount_amount) {
-				$.each(this.frm.doc["items"] || [], function(i, item) {
+				$.each(this.frm.doc._items || [], function(i, item) {
 					distributed_amount = flt(me.frm.doc.discount_amount) * item.net_amount / total_for_discount_amount;
 					item.net_amount = flt(item.net_amount - distributed_amount,
 						precision("base_amount", item));
@@ -654,7 +658,7 @@
 
 					// discount amount rounding loss adjustment if no taxes
 					if ((!(me.frm.doc.taxes || []).length || total_for_discount_amount==me.frm.doc.net_total || (me.frm.doc.apply_discount_on == "Net Total"))
-							&& i == (me.frm.doc.items || []).length - 1) {
+							&& i == (me.frm.doc._items || []).length - 1) {
 						var discount_amount_loss = flt(me.frm.doc.net_total - net_total
 							- me.frm.doc.discount_amount, precision("net_total"));
 						item.net_amount = flt(item.net_amount + discount_amount_loss,
@@ -883,4 +887,8 @@
 		}
 
 	}
+
+	filtered_items() {
+		return this.frm.doc.items.filter(item => !item["is_alternative_item"]);
+	}
 };