Thanks for reaching out to us. Allow me to help and provide some insights about migrating information to QuickBooks Self-Employed (QBSE).
Are you trying to convert data from QuickBooks Online (QBO) to QBSE? If so, there isn't a way to automatically convert the data automatically since QBSE is different from other types of QuickBooks products. What you can do is export the transactions from QBO and import it through .CSV File into QBSE.