AfterShip automatically imports shipments you added at the shopping cart in the past 3 days, and auto import takes place every 3 hours.  Do note the following 3 cases aftership will NOT import shipments

Shipments are entered in cart over 3 days ago
Tracking numbers are not a valid format
Tracking numbers already exist in your aftership account

You can also manually trigger an import at the app connection click on Sync app.
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