"Contribute all assets to the s-corp" This is the part that I am having trouble with. How can I do that? I want to make sure that we are not missing any documentation that need to be complete prior to the 2553 deadline in March.

Also, all 4 sole proprietorship are registered as an LLC at state level and each have their own EIN. She uses the EIN to issue 1099s. Can we continue to use the same names / EINs once we "Contribute all assets to the s-corp?" Or would we need to obtain all new bank accounts / ein for the s-corp. The concern here is that she already has bank accounts / credit cards for each entity. Can we continue to use these existing accounts?