I'm starting a new startup with a cofounder. Do I need to also create a shareholders agreement or is a company constitution enough?

I'll keep try to keep this answer brief, but there are several factors and nuances that can be discussed in more depth. Where you decide to incorporate partly depends on what your future goals are with your company. Companies that plan to seek venture capital or go public typically choose Delaware as the state of incorporation, and usually choose a C-Corp. Delaware has a very well developed body of law surrounding corporate governance and that provides comfort and more certainty to future VC investors. If you're not planning to seek VC money any time soon, an LLC is a smart decision because of the tax benefits it can provide to you as the owner. It sounds like you want to grow your company on your own without outside financing. If that's the case, I would recommend forming your LLC in California. Regarding California vs. Delaware, one benefit to forming your LLC in California is that you can avoid paying a registered agent fee which can cost anywhere from $100-200 a year. If you plan to seek venture capital down the road, you can reincorporate in Delaware.

In the US, terms and conditions do not override the law of the land. Depending on the exact situation, and intent, I would suspect that an entity could make the case for fraud, trademark infringement, theft, or copyright violation. The practice will likely get you blacklisted by any search engine of significances, undercutting whatever your objective was in the first place.

One word: Royalties This means you generate the idea and develop it enough to look interesting to a larger company who would be willing to pay you a royalty for your idea. This happens all the time. Rock stars, authors and scientists routinely license their creative ideas to other companies who pay them a royalty. Anyone can do it. Your business, therefore, would be a think tank. You (and your team, if you have one) would consider the world's problems, see what kinds of companies are trying to solve those problems, and then develop compelling solutions that they can license from you. You have to be able to sell your idea and develop a nice presentation, a little market research and an understanding of basic trademark and patent law. The nice thing about doing this is that if you develop enough cool ideas you will have royalties coming in from a lot of different sources, this creates a stable, passive revenue stream that requires little or no work to maintain. Start in your spare time and plan on the process taking 3-5 years. Set a goal to have a few products in the market that provide enough revenue (royalties) to cover your basic living expenses. Then you can quit your day job and dedicate more time and increase the momentum. A good idea business should have dozens, if not hundreds of license contracts generating royalties. It's possible to pull this off. And it is a fun job (I'm speaking from experience).

Disclaimer: I'm not a lawyer, I've never played one on TV, and it has been ages since I've stayed at a Holiday Inn. However, it sounds like you've stated clearly that your need is a lawyer who SPECIALIZES in contract law, with EXPERIENCE doing so for Digital Agencies. A great way to find someone like that is to ask other agencies that you have a good relationship with. For critical professional services like legal representation, I've always had a strong preference for a referral. Preferably from someone I know who has enough similarity in business and principles that I can reasonably expect to have the same good outcomes they've enjoyed. I'd say this is a matter of asking a few friends in the business for referrals - and then interviewing them. If you don't have friends in the business - consider searching Clarity for people with digital agency experience (rather than legal experience), and request a call to get their recommendations on counsel.

Yes you should be reporting the capital contributions. Under the old Form 5472 rules, it's true that only items that impacted taxable income would be reportable transactions. So, a capital contribution by you to the corporation would not be reportable, unless the equity contribution was somehow below or above a fair value contribution in exchange for services that you might provide for the corporation - essentially an imputed reportable transactions. When the IRS changed the Form 5472 rules to require non-U.S. owned single member LLC's, they expanded the reportable transaction definition to include virtually everything. The term “transaction” is defined in Treas. Regs. Section 1.482-1(i)(7) to include any sale, assignment, lease, license, loan, advance, contribution or other transfer of any interest in or a right to use any property or money, as well as the performance of any services for the benefit of, or on behalf of, another taxpayer. So, for example, contributions and distributions would be considered reportable transactions with respect to such entities. These amounts can be reported on Lines 12 and 25 with an explanatory footnote that clarities the amounts are capital contributions and not amounts that impact taxable income.