Follow the steps to complete your IRS 8821 form online.

1. Click 'Get Form' button to access the IRS 8821 form and open it in your preferred online editor.
2. In section 1, fill in the taxpayer information. Ensure you include the taxpayer's name, address, taxpayer identification numbers, daytime telephone number, and plan number, if applicable. Remember to have the taxpayer sign and date the form on line 6.
3. In section 2, designate individuals by providing their names and addresses. Include their PTIN (Preparer Tax Identification Number) and telephone numbers. If additional designees are needed, attach a list and check the box indicating this.
4. In section 3, specify the tax information that each designee is authorized to access. Include the type of tax, tax form numbers, years or periods, and specific tax matters as necessary. If you wish to authorize access via an Intermediate Service Provider, check the appropriate box.
5. In section 4, you may choose to indicate specific uses not recorded in the Centralized Authorization File (CAF) by checking the corresponding box. If you've checked this box, skip to the next step.
6. Fill out section 5 if you're retaining prior tax information authorizations. If the box in section 4 is not checked, you must do this to prevent automatic revocation of prior authorizations.
7. In section 6, ensure that the taxpayer's signature, date, and printed name are entered. If the form is signed by someone other than the taxpayer, that individual must certify they have the legal authority to execute the form.
8. Once all fields are accurately completed, save any changes made to the form, and proceed to download, print, or share the completed IRS 8821 as required.

Start completing your IRS 8821 form online today to efficiently manage your tax information authorization.