Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Itemized Deductions
Application for Automatic Extension of Time
Request for Taxpayer Identification Number (TIN) and Certification


Single and Joint Filers With No Dependents
Employer's Quarterly Federal Tax Return
Employee's Withholding Allowance Certificate
Request for Transcript of Tax Return

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

Digital Certificates

Digital certificates bind digital information to physical identities and provide non-repudiation and data integrity. Before you begin the IDES enrollment process, each entity should obtain one valid digital certificate issued by an approved certificate authority (CA). IDES stores your public key and related digital certificate.  IDES only recognizes and accepts digital certificates issued by IRS approved certificate authorities, listed below.

IRS Public Key

The IRS Public Key is a certificate that can be downloaded from the IDES Enrollment site. The public certificate should be included in the FATCA data packet (transmission archive) to the IRS.

Certificate File Format

Supported formats for the digital certificate are:

  • Distinguished Encoding Rules (DER) binary X.509
  • Privacy Enhanced eMail (PEM) ASCII (Base-64) encoded X.509

IDES will convert digital certificates received in DER format to Base64 for storage and retrieval.

Certificate Authority Type of Certificate


Standard SSL



Standard SSL

EV Multi-Domain SSL


Organization SSL

Extended SSL


Standard Server SSL

FATCA Organization Certificate


Secure Site SSL

Secure Site with EV


SSL Web Server

SSL Web Server with EV