I'm glad you reached out to us today! I'd love to share with you the difference of QuickBooks Self-Employed and Simple Start.
The main difference between both programs is that QuickBooks Self-Employed is designed for Independent Contractors, while Simple Start is for Small Businesses.
QBSE let's you track miles, your income & expense, record invoices and accept payments, and run reports. Simple Start provides the same features with the help of some third party apps also, and allows you to create estimates and send them to your customers.
For more details about their comparison, I recommend you visit our website. It has in-depth information about the features and pricing of each program.
If you have additional questions about these programs, feel free to reach out to me again.