Do I have to use my Social Security Number when I e-file my business tax extension, or will I use my Tax-ID (EIN) number?

It depends; For most business types, you will simply need your Tax-ID (EIN) or SSN for sole proprietorship to file your business tax return ext. For most business types, you will simply need your Tax-ID number (EIN) to file your business tax extension (IRS Tax Form 7004). If you are filing for a single member LLC business, you should file for a personal tax extension (IRS Tax Form 4868) and use your Social Security Number, rather than a Tax-ID (EIN).If you are a partner in an LLC or partnership,
Then, Because a multi-member LLC or a partnership has to file a separate tax return for the business, you will need to file tax extensions for both the business and well as a personal income tax extension. self-employed.



If you are filing for a single member LLC business, you will use your social security number rather than a Tax-ID (EIN).You need your EIN as long as you have employees ; you operate your business as a corporation or a partnership; you file any of these tax returns: Employment, Excise, or Alcohol, Tobacco and Firearms; you withhold taxes on income, other than wages, paid to a non-resident alien ; you have a Keogh plan ; you are involved with any of the following types of organizations;Trusts, except certain grantor-owned revocable trusts, IRAs, Exempt Organization Business Income Tax Returns; Estates; Real estate mortgage investment conduits;Non-profit organizations; Farmers' cooperatives; Plan administrators