To fill out the one-time Homestead Tax Credit Application (principal residence assessment cap). A homestead exemption can benefit homeowners if one spouse in a twoincome household dies.To apply for a Homestead Exemption online, you need to provide electronic copies of the documents listed below. You may file this application online at onestop.md. Exemption amount is for single person or married couple's interest in homestead. Protection under homestead laws is typically limited to "natural persons" who reside in the applicable jurisdiction. Maryland requires all homeowners to submit a onetime application to establish eligibility for the Homestead Tax Credit. Application: Maryland homeowners must apply for the homestead tax credit exemption. Surviving spouses of military personnel killed in the line of duty may also qualify for this exemption.