What kind of penalties and interest will I be charged for paying and filing my taxes late?

Interest, compounded daily, is charged on any unpaid tax from the due date of the return until the date of payment. The interest rate is the federal short-term rate plus 3 percent. That rate is determined every three months.

For current interest rates, go to News Releases and Fact Sheets and find the most recent Internal Revenue release entitled Quarterly Interest Rates.

In addition, if you filed on time but didn't pay on time, you'll generally have to pay a late payment penalty of one-half of one percent of the tax owed for each month, or part of a month, that the tax remains unpaid after the due date, not exceeding 25 percent. However, you will not have to pay the penalty if you can show reasonable cause for the failure. The one-half of one percent rate increases to one percent if the tax remains unpaid after several bills have been sent to you and the IRS issues a notice of intent to levy.

Beginning January 1, 2000, if you filed a timely return and are paying your tax pursuant to an installment agreement, the penalty is one-quarter of one percent for each month, or part of a month, that the installment agreement is in effect.

If you did not file on time and owe tax, you may owe an additional penalty for failure to file unless you can show reasonable cause. The combined penalty is 5 percent (4.5% late filing, 0.5% late payment) for each month, or part of a month, that your return was late, up to 25%. The late filing penalty applies to the net amount due, which is the tax shown on your return and any additional tax found to be due, as reduced by any credits for withholding and estimated tax and any timely payments made with the return. After five months, if you still have not paid, the 0.5% failure-to-pay penalty continues to run, up to 25%, until the tax is paid. Thus, the total penalty for failure to file and pay can be 47.5% (22.5% late filing, 25% late payment) of the tax owed. Also, if your return was over 60 days late, the minimum failure-to-file penalty is the smaller of $100 or 100% of the tax required to be shown on the return.

Also, refer to Tax Topic 653, IRS Notices and Bills and Penalty and Interest Charges.

I am filing my U.S. tax return from the U.K. and am eligible for the automatic 2-month extension. Do my forms need to be in Philadelphia by June 15th, or do they just need to be postmarked by June 15th?

Your return must be postmarked by June 15.

May an employee provide me my Form W-2 electronically?

Yes, an employer may furnish your Form W-2 electronically provided certain criteria are met. You must affirmatively consent to receive the Form W-2 in an electronic format and prior to, or at the time of, your consent, your employer must provide you a disclosure statement containing specific disclosures. Additionally, the electronic version of the Form W-2 must contain all required information and comply with applicable revenue procedures relating to substitute statments to recipients. If the statement is furnished on a Web site, then your employer must notify you, via mail, electronic mail, or in person, that the statement is posted on a Web site and provide instructions on accessing and printing the statement.

When are the quarterly estimated tax returns due?

Your first estimated tax payment is usually due the 15th of April. You may pay the entire year's estimated tax at that time, or you may pay your estimated tax in four payments. The four payments are due April 15th, June 15th, September 15, and January 15th of the following year.

If the due date for making an estimated tax payment falls on a Saturday, Sunday, or legal holiday, the payment will be on time if you make it on the next day that is not a Saturday, Sunday, or legal holiday. For example, a payment due Saturday, January 15, 2005 will be on time if you make it by Tuesday January 18, 2005. Note: Monday January 17, 2005 is a legal holiday.

What is the due date for business returns?

Some forms and entities have due dates other than the well-known April 15th due date. The instructions for the each type of form used will have the appropriate due date(s) noted. In general, sole proprietor's schedule of income and expenses is attached to the 1040. Therefore, the due date is the same as the 1040.

A Corporation must generally use the calendar year, unless the entity can establish a business purpose for having a different tax year. The due date is usually March 15th.

A partnership generally must conform its tax year of the partners unless the partnership can establish a business purpose for having a different tax year. The tax year is the same as one or more partners that own (in total) more than a 50-percent interest in partnership profits and capital. If there is no majority interest tax year, the partnership must adopt the same tax year as that of its principal capital holder. Where neither condition is met, a partnership must use the calendar year. A limited Liability Company reporting as a partnership has the same tax year as a majority of its partners.

I don't owe taxes. Can I file electronically after April 15th?

Yes, you can electronically file your return after April 15th, however to do so you must file Form 4868 (PDF), an Application for an Extension of Time to File, on or before April 15th . If the extension is timely filed, you have until August 15th to file your return. If the 15th falls on a weekend or federal holiday, you have until midnight the following business day to submit your extension or your tax return. If additional time is needed please refer to the instruction for Form 2688 (PDF), Application for Additional Time to File US Individual Income Tax Return. Please note that the Form 2688 is not an automatic extension and must be approved by IRS; if it is approved you may have until October 15th to file your return electronically.