According to the IRS you need a NEW EIN if:
Sole Proprietors
You will be required to obtain a new EIN if any of the following statements are true.
- You are subject to a bankruptcy proceeding.
- You incorporate.
- You take in partners and operate as a partnership.
- You purchase or inherit an existing business that you operate as a sole proprietorship.
You will not be required to obtain a new EIN if any of the following statements are true.
- You change the name of your business.
- You change your location and/or add other locations.
- You operate multiple businesses.
Corporations
You will be required to obtain a new EIN if any of the following statements are true.
- A corporation receives a new charter from the secretary of state.
- You are a subsidiary of a corporation using the parent's EIN or you become a subsidiary of a corporation.
- You change to a partnership or a sole proprietorship.
- A new corporation is created after a statutory merger.
You will not be required to obtain a new EIN if any of the following statements are true.
- You are a division of a corporation.
- The surviving corporation uses the existing EIN after a corporate merger.
- A corporation declares bankruptcy.
- The corporate name or location changes.
- A corporation chooses to be taxed as an S corporation.
- Reorganization of a corporation changes only the identity or place.
Partnerships
You will be required to obtain a new EIN if any of the following statements are true.
- You incorporate.
- Your partnership is taken over by one of the partners and is operated as a sole proprietorship.
- You end an old partnership and begin a new one.
You will not be required to obtain a new EIN if any of the following statements are true.
- The partnership declares bankruptcy.
- The partnership name changes.
- You change the location of the partnership or add other locations.
- A new partnership is formed as a result of the termination of a partnership under IRC section 708(b)(1)(B).
- 50 percent or more of the ownership of the partnership (measured by interests in capital and profits) changes hands within a twelve-month period (terminated partnerships under Reg. 301.6109-1).
Limited Liability Company (LLC)
An LLC is a new entity created by state statute. The IRS did not create a new tax classification for the LLC when it was created by the states; instead IRS uses the tax entity classifications it has always had for business taxpayers: corporation, partnership, or sole proprietor. An LLC is always classified by the IRS as one of these types of taxable entities. - So ASK YOUR TAX GODDESS!!!
Entity Formation and Changes can be one of the most confusing tasks when dealing with the IRS -
So, if you have any questions - Don't hesitate to ask!
As Always,
Your Tax Goddess!



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