You will not need to make any additional filings if your company uses Fundable. However, whether you use Fundable or not, you may still need to make certain filings with the government.

While we'd love to be able to say with certainty what legal filings will be necessary - it varies from raise to raise and state to state, depending not only where you are based, but where the prospective investors are based. 

The best advice we can give you - while not what you want to hear: Ask a lawyer.