How to File for Homestead Exemption

Dekalb County
http://taxcommissioner.dekalbcountyga.gov/TaxCommissioner/homesteadOnlineApp/TChomesteadOnline.asp

Link to application is at the bottom of the instruction page.
Deadline for submitting application, either online or by mail, is April 1st.
City of Dunwoody homes are included in Dekalb.

City of Decatur
If you live in the City of Decatur, YOU MUST APPLY FOR BOTH DECATUR AND DEKALB.

https://www.decaturga.com/city-government/city-departments/administrative-services/taxes-and-fees/homestead-exemption-form

Deadline for submitting application, either online or by mail, is April 1st. New eligible homeowners are encouraged to apply for any new exemptions prior March 15th to ensure exemption will appear on your 1st installment tax bill.

Fulton County
http://www.qpublic.net/ga/fulton/online_filing.html

Deadline for submitting the form either online or by mail is April 1st. City of Sandy Springs homes are included in Fulton County.

Cobb County
http://www.cobbtax.org/Forms/HtmlFrame.aspx?mode=content/taxforms.htm

Deadline for submitting original application by mail is April 1st.

Gwinnett County
http://gwinnetttaxcommissioner.publicaccessnow.com/HomesteadExemption.aspx

Deadline for submitting application, either online or by mail, is April 1st.