How can I prove income when my business is registered but has not generated any revenue yet for my visa application?

The user is seeking advice on how to handle a request from the Thai embassy for proof of income related to their registered business that has yet to generate revenue. They have portfolio work to show but are facing challenges regarding income evidence. Comments suggest that without income, approval may be difficult, and one user shared a successful experience by providing a cover letter and a signed contract for future work.