How can I add 'hear about us' to the Thank You page?

[littletichel]

Hi,

I am trying to add "How did you hear about us" to the Thank You Page. I know how to add it the the checkout page, but we want it on the the Thank You page.

I tried adding 

{% if first_time_accessed %}
// {% render 'hear-about-us' %}
{% endif %}

to the Additional scripts in the chen=ckout section in my settings,  but when I tested it I got "// Liquid error: This liquid context does not allow includes."

Anyone know how to fix this?

Thanks

[Eige]

Hi there, could you please tell me how to add it to the checkout page?