diff --git a/erpnext/regional/india/e_invoice/e_invoice_utils.py b/erpnext/regional/india/e_invoice/e_invoice_utils.py
index e1d380596b6..9c7b4d5c46f 100644
--- a/erpnext/regional/india/e_invoice/e_invoice_utils.py
+++ b/erpnext/regional/india/e_invoice/e_invoice_utils.py
@@ -339,16 +339,18 @@ def get_item_list(invoice):
 
 	for d in invoice.items:
 		item_schema = read_json('einv_item_template')
-		item = frappe._dict(dict())
+		item = frappe._dict({})
 		item.update(d.as_dict())
 		item.sr_no = d.idx
 		item.description = d.item_name
 		item.is_service_item = 'N' if frappe.db.get_value('Item', d.item_code, 'is_stock_item') else 'Y'
 		item.batch_expiry_date = frappe.db.get_value('Batch', d.batch_no, 'expiry_date') if d.batch_no else None
 		item.batch_expiry_date = format_date(item.batch_expiry_date, 'dd/mm/yyyy') if item.batch_expiry_date else None
-		item.unit_rate = item.base_price_list_rate if item.discount_amount else item.base_rate
-		item.total_amount = item.unit_rate * item.qty
-		item.discount_amount = item.discount_amount * item.qty
+		item.qty = abs(item.qty)
+		item.unit_rate = abs(item.base_price_list_rate) if item.discount_amount else abs(item.base_rate)
+		item.total_amount = abs(item.unit_rate * item.qty)
+		item.discount_amount = abs(item.discount_amount * item.qty)
+		item.base_amount = abs(item.base_amount)
 		item.tax_rate = 0
 		item.igst_amount = 0
 		item.cgst_amount = 0
@@ -360,18 +362,18 @@ def get_item_list(invoice):
 				item_tax_detail = json.loads(t.item_wise_tax_detail).get(item.item_code)
 				if t.account_head in gst_accounts.cess_account:
 					item.cess_rate += item_tax_detail[0]
-					item.cess_amount += item_tax_detail[1]
+					item.cess_amount += abs(item_tax_detail[1])
 				elif t.account_head in gst_accounts.igst_account:
 					item.tax_rate += item_tax_detail[0]
-					item.igst_amount += item_tax_detail[1]
+					item.igst_amount += abs(item_tax_detail[1])
 				elif t.account_head in gst_accounts.sgst_account:
 					item.tax_rate += item_tax_detail[0]
-					item.sgst_amount += item_tax_detail[1]
+					item.sgst_amount += abs(item_tax_detail[1])
 				elif t.account_head in gst_accounts.cgst_account:
 					item.tax_rate += item_tax_detail[0]
-					item.cgst_amount += item_tax_detail[1]
+					item.cgst_amount += abs(item_tax_detail[1])
 		
-		item.total_value = item.base_amount + item.igst_amount + item.sgst_amount + item.cgst_amount + item.cess_amount
+		item.total_value = abs(item.base_amount + item.igst_amount + item.sgst_amount + item.cgst_amount + item.cess_amount)
 		einv_item = item_schema.format(item=item)
 		item_list.append(einv_item)
 
@@ -382,11 +384,11 @@ def get_value_details(invoice):
 	gst_accounts_list = [d for accounts in gst_accounts.values() for d in accounts if d]
 
 	value_details = frappe._dict(dict())
-	value_details.base_net_total = invoice.base_net_total
-	value_details.invoice_discount_amt = invoice.discount_amount
-	value_details.round_off = invoice.base_rounding_adjustment
-	value_details.base_grand_total = invoice.base_rounded_total
-	value_details.grand_total = invoice.rounded_total
+	value_details.base_net_total = abs(invoice.base_net_total)
+	value_details.invoice_discount_amt = abs(invoice.discount_amount)
+	value_details.round_off = abs(invoice.base_rounding_adjustment)
+	value_details.base_grand_total = abs(invoice.base_rounded_total)
+	value_details.grand_total = abs(invoice.rounded_total)
 	value_details.total_cgst_amt = 0
 	value_details.total_sgst_amt = 0
 	value_details.total_igst_amt = 0
@@ -394,13 +396,13 @@ def get_value_details(invoice):
 	for t in invoice.taxes:
 		if t.account_head in gst_accounts_list:
 			if t.account_head in gst_accounts.cess_account:
-				value_details.total_cess_amt += t.base_tax_amount
+				value_details.total_cess_amt += abs(t.base_tax_amount)
 			elif t.account_head in gst_accounts.igst_account:
-				value_details.total_igst_amt += t.base_tax_amount
+				value_details.total_igst_amt += abs(t.base_tax_amount)
 			elif t.account_head in gst_accounts.sgst_account:
-				value_details.total_sgst_amt += t.base_tax_amount
+				value_details.total_sgst_amt += abs(t.base_tax_amount)
 			elif t.account_head in gst_accounts.cgst_account:
-				value_details.total_cgst_amt += t.base_tax_amount
+				value_details.total_cgst_amt += abs(t.base_tax_amount)
 	
 	return value_details
 
@@ -520,7 +522,7 @@ def validate_einvoice(validations, einvoice, errors=[]):
 		if value_type == 'string':
 			einvoice[fieldname] = str(value)
 		elif value_type == 'number':
-			einvoice[fieldname] = flt(value, 2)
+			einvoice[fieldname] = flt(value, 2) if fieldname != 'Pin' else int(value)
 
 		max_length = field_validation.get('maxLength')
 		minimum = flt(field_validation.get('minimum'))
diff --git a/erpnext/regional/india/e_invoice/einv_template.json b/erpnext/regional/india/e_invoice/einv_template.json
index 0acc01cd386..46741ca0337 100644
--- a/erpnext/regional/india/e_invoice/einv_template.json
+++ b/erpnext/regional/india/e_invoice/einv_template.json
@@ -83,10 +83,10 @@
             "InvStDt": "{period_details.start_date}",
             "InvEndDt": "{period_details.end_date}"
         }},
-        "PrecDocDtls": {{
+        "PrecDocDtls": [{{
             "InvNo": "{prev_doc_details.invoice_name}",
             "InvDt": "{prev_doc_details.invoice_date}"
-        }}
+        }}]
     }},
     "ExpDtls": {{
         "ShipBNo": "{export_details.bill_no}",