erpnext/regional/india/address_template.html

{{ address_line1 }}<br>{% if address_line2 %}{{ address_line2 }}<br>{% endif -%}{{ city }}<br>
{% if state %}{{ state }}<br>{% endif -%}
{% if pincode %}{{ pincode }}<br>{% endif -%}
{{ country }}<br>
{% if gstin %}GSTIN: {{ gstin }}<br>{% endif -%}
{% if phone %}Phone: {{ phone }}<br>{% endif -%}
{% if fax %}Fax: {{ fax }}<br>{% endif -%}
{% if email_id %}Email: {{ email_id }}<br>{% endif -%}