Is there a good way to embed a fedex, or UPS or USPS shipping number into Zoho CRM?

Is there a good way to embed a fedex, or UPS or USPS shipping number into Zoho CRM?

I'd like to be able to map a unique identifier such as an invoice number, to my shipping tools from USPS in particular and be able to embed the tracking number back to the invoice so I have one place to go for every invocie.