17 October 2013
In most cases, your Tax Identification Number will remain the same throughout the duration of your business. You will only need to obtain a new identification number under special circumstances.
If you own multiple corporations or LLCs, then you will need a different Tax ID for each entity. Also, if your company has subsidiaries, each subsidiary should have its own Tax ID. However, this is not the case for sole-proprietorships or general partnerships, only “incorporated” entities that you file with the state.
Keep in mind that you will not be required to file for a new tax identification number if:
You change the name of your business.
You change the location of your business.
The corporation or LLC declares bankruptcy.
Your LLC is legally terminated under IRC section 708(b)(1)(B) and a new one is automatically formed.
You are operating as a corporation and choose to be taxed as an s-corporation.
You operate under a sole-proprietorship and you file for personal bankruptcy, form a corporation or LLC or take on a partner (and thus become a partnership).
Your partnership (or LLC) is taken over by one of the partners and, since it is run by only one person, is therefore considered by the IRS to be a sole-proprietorship, or disregarded.
You purchase or inherit an existing business which you plan to operate as a sole-proprietorship.
Your corporation or partnership receives a new charter from the Secretary of State (you’ve created a new entity).
A corporation receives a new charter from the Secretary of State.
You are a subsidiary of an incorporated entity.
You change entity types, or become a sole-proprietorship or general partnership.
18 October 2013
TIN number remains the same after merger. E.g "A" company is merging with "B" company and here you have to surrender RC/TIn of "A" company and inform the VAT circle about the merger. Only one TIN number will be applicable (i.e with of the parent company)after merger.