What is the process to convert a Single Member LLC to a Multimember LLC?

A final return is filed if the a member of an LLC has either resigned or died to convert a multiple member limited liability company to a single member. A multi-member LLC files a form 1065 whereas a single member LLC files a form 1040.

What happens if a member of an LLC resigns during the year?

A partial year final return is filed if a member of a limited liability company resigns during the year.

How to notify the IRS about the conversion of an Entity?

An explanation letter is sent along with the final partnership return 1065.