There are several fax numbers for the Internal Revenue Service depending on whether the matter is business or personal and the geographic location where the taxpayer resides, explains the IRS. The best way to determine t... More »

Use Internal Revenue Service Form 2848 to authorize someone to represent you before the IRS, according to the IRS. You must select someone who is eligible to practice before the agency. When you authorize a representativ... More » Business & Finance Taxes

Taxpayers can file online complaints about misconduct by Internal Revenue Service personnel, deceptive practices by outside tax contractors and impersonation of IRS employees at, reports the Treasury Inspect... More » Business & Finance Taxes

Both Social Security numbers and EINs are identification numbers to allow the IRS to enforce tax laws and rules, but a Social Security number is for an individual taxpayer, while an EIN number is for business taxpayers. ... More » Business & Finance Taxes

A taxpayer can call the IRS with tax questions or visit a local Taxpayer Assistance Center for face-to-face assistance, according to the Internal Revenue Service. The Interactive Tax Assistant is an automatic tool that r... More » Business & Finance Taxes

When the Internal Revenue Service believes that a tax return was filed under a stolen identity, it suspends processing of the paperwork and mails an identity verification letter to the taxpayer, according to the IRS. The... More » Business & Finance Taxes

To find a lost or misplaced Employer Identification Number or taxpayer identification number, view the computer-generated notice issued by the Internal Revenue Service during the application process, advises the IRS. Alt... More »