1. Go to www.stamps.com
2. Click Get Started
3. Enter your credentials and press Continue
4. Fill out your mailing information and credit card information and press Continue
5. Select your Welcome Kit. If you do not need a scale, select Welcome Kit.
6. Go to the top right and Sign In to your account
7. Select an option
8. Login to your SureDone account and go to SETTINGS>ORDERS & SHIPPING>Shipping.
9. Expand the "Shipping" section and fill out your Stamps.com credentials (as indicated in below screenshot)
10. Scroll to the bottom and click Save Settings