We want to use the shipping label that has an extra removable tab at the top. Fedex wants to see
"label_size": "4X6.75_TRAILING_DOC_TAB"
We are using the Easypost API and it doesn’t support this size, the closest is regular 4x6. Easypost supports it but the API doesn’t. Has anyone managed to use this label size with any of the carrier integrations?