Can I send a document I missed after i send my application?

[ksshhs]

I already sent my application like 20days ago. but suddenly i worry about my evidence of marketing source is not good enough.

Basically, I set up a Product Design studio. and I put an ad on online design magazine/ blog.
in the ad, it says
XXX(studio name) Design studio, my name and website address.

But the ad is quite small, and i didn't say about what exactly I am doing apart from design studio.
in my trading contract, it tells about what i did for my client. but I a bit worry about my marketing source.
So I am thinking of sending them printouts of my website. does anyone know if i can send them more evidence after i send my application?
and what do you think about my ad?

[vinny]

Duplicate Post.