You should always keep a copy of your tax return. It is even more important for 2017, as the Internal Revenue Service moves to strengthen its e-signature validation process.

You must use your 2015 adjusted gross income or your 2015 self-select PIN to validate your identity on your federal electronic tax return this tax season. The electronic filing PIN is no longer available as an option.

The IRS, state tax agencies and the nation's tax industry — partners in combating identity theft -ask for your help in their efforts. Working in partnership with you, we can make a difference.

That's why we launched a public awareness campaign that we call "Taxes. Security. Together." We've also launched a series of security awareness tips that can help protect you from cybercriminals.

As part of the IRS efforts to protect taxpayers, the e-signature validation change mostly affects those taxpayers who have used tax software in the past but are changing software brands in 2017. If that's you, learn more about how to verify your identity and electronically sign your tax return at Validating Your Electronically Filed Tax Return.

Here are a few important steps:

  1. Find a copy of your 2015 tax return; the original return filed with the IRS.
  2. Create a five-digit Self-Select PIN to serve as your electronic signature. It can be any five numbers except all zeros.
  3. If married filing jointly, each taxpayer must create a self-select PIN.
  4. Provide your date of birth when prompted
  5. Provide either your 2015 adjusted gross income or your 2015 self-select PIN as the "shared secret" between you and the IRS. Either number, along with your date of birth, will serve to help validate your identity and verify your e-signature.
  6. On your 2015 tax return, your adjusted gross income (AGI) is on line 37 of the Form 1040; line 21 on the Form 1040-A or line 4 on the Form 1040-EZ.

This change will not affect most taxpayers. For example, if you are a returning customer, your software generally will automatically populate your date of birth and "shared secret" information. Those of you who switched software products generally must enter the "shared secret" information yourself.

If you don't have a copy of your 2015 tax return, you may be able to get a copy from your prior-year software provider. If your software account is still active, you may be able to view your 2015 federal return to find your AGI. Or, you may ask your prior-year tax preparer for a copy if you had your return prepared professionally. If those are not options, you may use a Get Transcript self-help tool on IRS.gov to get a Tax Return Transcript showing your AGI.

Use Get Transcript Online to immediately view your AGI. You must pass the Secure Access identity verification process. Select the "Tax Return Transcript" and use only the "Adjusted Gross Income" line entry.

Use Get Transcript by Mail or call 800-908-9946 if you cannot pass Secure Access and need to request a Tax Return Transcript. Please allow five to 10 days for delivery. Use only the "Adjusted Gross Income" line entry.

The IRS, state tax agencies and the tax industry joined together as the Security Summit to enact a series of initiatives to help protect you from tax-related identity theft. You can help by taking these basic steps.

To learn additional ways you can take to protect your personal and financial data, visit "Taxes. Security. Together." Also read Publication 4524, Security Awareness for Taxpayers.

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Upcoming Tax Dates

April 10 — Employees who work for tips
If you received $20 or more in tips during March, report them to your employer. You can use Form 4070.

April 15 — Individuals *2017 Filing Deadline: 04-17, 2018*
File a 2017 income tax return (Form 1040, 1040A, or 1040EZ) and pay any tax due. If you want an automatic 6 month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. For more information, see Form 4868. Then, file Form 1040, 1040A, or 1040EZ by 10-15.

April 15 — Corporations *2017 Filing Deadline: 04-17, 2018*
File a 2017 calendar year income tax return (Form 1120) and pay any tax due. Details

April 15 — Individuals
If you are not paying your 2018 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2018 estimated tax. Use Form 1040ES.

April 15 — Household Employers
If you paid cash wages of $2,000 or more in 2017 to a household employee, you must file Schedule H Details

April 15 — Corporations
Deposit the first installment of estimated income tax for 2017 Details

April 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in March.

April 15 — Household employers
If you paid cash wages of $$2,000 or more in 2017 to a household employee, you must file Schedule H (Form 1040). If you are required to file a federal income tax return (Form 1040), file Schedule H (Form 1040) with the return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H (Form 1040) if you paid total cash wages of $1,000 or more in any calendar quarter of 2016 or 2017 to household employees. Also, report any income tax you withheld for your household employees.

April 30 — Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2018. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter timely, properly, and in full, you have until 05-10 to file the return.

April 30 — Federal unemployment tax.
Deposit the tax owed through 03-if more than $500.

View More Tax Dates