Each taxpayer in the U.S. needs to have a unique nine-digit number that can identify them to the IRS. Many Americans use their Social Security number, or SSN, to confirm their identity on tax returns ...

An Individual Taxpayer Identification Number is a nine-digit number the IRS uses to process taxes and administer tax laws. The agency issues them only to certain nonresident and resident aliens, as ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Lea Uradu, J.D., is a Maryland state registered tax preparer, state-certified notary public, ...

An employer identification number (EIN) is issued by the Internal Revenue Service (IRS) to identify a business for tax administration purposes. It’s also used to complete some core business tasks, ...

As you prepare to file your taxes in advance of the April 15 deadline, you may be wondering about certain terminology. For instance, the 1040 form that most people use to file their federal income ...

Forbes contributors publish independent expert analyses and insights. Darren Case is an Arizona attorney covering tax and estate planning. As we come close to the end of taxable year in conjunction ...

The U.S. Department of the Treasury's Financial Crimes Enforcement Network (FinCEN) recently issued two new FAQs providing guidance on key taxpayer compliance measures. Areas covered in the FAQs ...

Ever tried filing taxes, opening a U.S. bank account, or applying for a loan and hit a wall because you don’t have a Social Security Number? That’s where a taxpayer identification number (or TIN) can ...

If you have a business, you may need to fill out IRS Form W-9 Katharine Paljug is a financial writer and editor with over a decade of industry experience. Her writing has covered nearly every aspect ...