Decide if you're going to use a free app such as "ID Photo Studio" or have your passport size picture taken at Walgreens, CVS, etc. If you're going to use the app go ahead and take your picture so it's ready for the online application.
Go to OSBI's website by clicking the button below
Complete the online application. Upload your passport photo. Make your payment for either a 5 year ($100) or 10 year ($200) license. At the end you'll print off a summary page.
Take the summary page, the original certificate you received from the OSDA class (not a copy), your passport photos if you didn't upload them and a cashiers check or money order to the sheriff's office. Contact your county sheriff's office for the amount.
The sheriff's office will take your fingerprints and send all of your documents to the OSBI.
Wait for your license to come in the mail.