USPS:
You will need a USPS account web registration. You can schedule https://www.usps.com/business/web-tools-apis/welcome.htm
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Log into admin of site
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Click on Modules Menu
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Click on Shipping
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Click on the Desired Shipping Method in this case USPS
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Click on Install
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Click on Edit
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Obtain web tools api using this link: https://www.usps.com/business/web-tools-apis/welcome.htm
The username and password will then be emailed to you
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Input your USPS Username, based on the web tools api registration
- Adjust Settings based on your shipping preferences
- Enable USPS Shipping: Set to True to install
- Enter the USPS User ID
- Tax Class
- Shipping Zone
- Sort Order
- Shipping Methods
- Check the boxes that you would like to offer as a service option for your customers
- enter the minimum and maximum values
- You can add a handling fee to these values if you wish to
- Extra Services (Domestic and International)
- Retail pricing or online pricing
- Rates Sort Order
- International Regulations
- Show Weights
- USPS Server
- Send Debug Email