You can do this with a code page.
Short version is:
1. Create a code page called shipping-label.html (or similar) and paste in your code.
2. Create a formula URL field in your table that opens that page (there is a setting to open the target in a new window/tab) and add the button to your form.
3. Use URL query parameters in the formula URL field or ajax on the code page to pull in record data from the form (Quickbase API_DoQuery) and replace the placeholder content in the html with jquery or similar.
I�m happy to elaborate if you have questions.
~Rob
