I’m spending all my revenues on fb and tiktok ads. I’m worried about taxes

[Vanthang]

Hey guys, I’m spending all my revenues on advertising and I’m wanting to know if I setup an llc, will I be able to write it all off and avoid having to pay taxes on profits I don’t even have because I had spent it all on advertising?

Also, I sell online services so I have no product cost. All my cost is just on advertising.

Thank you