Beyond those areas, your qualifications depend more on your experience and education, including self-study, than any certification, so you can simply declare or "self-anoint" yourself as qualified.
Too shy to promote yourself?
Contributing to our fear of self-promotion is the feeling that we aren't really "good enough." This is called "imposter syndrome" or self-doubt. We're afraid of being discovered to be a fraud.
Not the place to get a business loan
The penalties for late payment and failure to pay these "trust fund" taxes are significant, and they can't be discharged in bankruptcy. Criminal penalties can also apply.
To everything there is a season
As marketers "entering the conversation already taking place in the customer's mind" (Robert Collier), we know that conversation includes the current season and holidays This makes the seasons and holidays great "hooks" for advertising and promotions.