The Internal Revenue Service is reminding taxpayers who receive requests from the IRS to verify their identities by visiting idverify.irs.gov.

Taxpayers may receive Letter 5071C, via U.S. Postal Service mail, when the IRS stops suspicious tax returns that have indications of being identity theft but contains a real taxpayer's name and/or Social Security number. Only those taxpayers receiving the letter should access the website or call the special phone number listed in the letter.

Once the caller's identity is verified, the taxpayers can confirm whether or not they filed the return in question. If they did not file the return, the IRS can take steps at that time to assist them.

Taxpayers should have available their prior year tax return and their current year tax return, if they filed one, including supporting documents, such as Forms W-2 and 1099 and Schedules A and C.