The Department of Revenue for Kentucky offers the information below for submitting your Schedule ENDOW. It also says the following about mailing form "This application contains time-sensitive information; therefore, mailing the application is not recommended.
Choose one of the following options to submit the Endow application. E-mail: DORTaxCredits@ky.gov Fax: 502-564-0058 Hand–delivery: Department of Revenue, 1st floor security desk at 501 High Street, Frankfort, Kentucky (call 502-564-8139 and ask for an employee in the Tax Credits Section.)
Click here Endow Schedule. It has a special barcode on it.
Click here for Endow Kentucky Tax Credit.