Please ensure your students are submitted to your National TSA roster.  After entering students on your TSAWEB.ORG roster, you need to officially submit them.  This generates a National TSA ID number for them and initiates any billing/invoices for National TSA.  Once you have submitted and you have paid any fees on the National TSA website, myGATSA will sync the data.   Syncs run every hour on the hour

Once submitted, you will see a submitted date.  Please be aware that you might also owe fees to National TSA that need to be paid before the sync can occur.