Multi check box Flask (Python)

I think I have problem I'm stack I try to take value from multi checkbox in Flask

HTML:

{% for tag in tags %}
{{tag.name}}
{% endfor %}

FLASK:

tags = request.form.getlist("tags")
for i in tags:
   return i

This code always show only last value. If dumps tags show me all values but if I want for loop and save in database on save only one value I would like save separate values