Here's how to apply for the SBA Disaster Loan, and what you'll need to know to complete the application successfully. Completing the Targeted EIDL Advance application is a requirement to be considered for the Supplemental Targeted Advance.Find out how to apply for a small business disaster loan if your business suffered damage and is in a presidentially declared disaster area. I went through the process of filling out what little information they were asking me for in order to actually complete the processing of my eidl loan.