Partnership dissolved and became a sole proprietorship: Why can't I include details below? A bug.

No, the LLC itself does not need a new EIN.

After you file the "final" 1065. the taxpayer *MIGHT* need to call the IRS EIN telephone number to let them know the EIN is still being used for the SMLLC. However, I don't think I would worry about it unless there is a problem.

However, take a step back. Are there employees or excise taxes? If not, the LLC probably doesn't even need an EIN. For purposes of the W-9 and 1099s, they should use the EIN (or SSN) of the individual taxpayer. So the taxpayer may want to get an EIN in their own name (not the name of the LLC).

The EIN belongs to the LLC, not a Partnership.

Limited Liability Companies

You will be required to obtain a new EIN if the following statement is true:

• A corporation files papers with the state to convert to an LLC and will use the default classification of partnership. (The corporation is treated as if it has liquidated in this case.)

You will not be required to obtain a new EIN if the following statements are true:

• A corporation files papers with the state to convert to an LLC and will elect via Form 8832 to be taxed as a corporation.
• The number of members in the LLC changes from more than one member to a single member.
• The number of members in the LLC changes from a single member to more than one member.
• A sole proprietor files papers to become a state recognized entity, organizes as an LLC, and will file Form 8832 or Form 2553 to elect to be treated as a disregarded entity or taxed as a corporation or small business corporation.

https://sa.www4.irs.gov/modiein/individual/help/help-toc.jsp