Single Order w/Single Line Item but Need to Enter Multiple Tracking Numbers

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We routinely sell one item/sku that is the only item/sku ordered by the customer. This one item/sku is shipped out in 4 boxes. How can I enter all four tracking numbers? The "change the quantity and ship partial option" is not applicable in this situation. There is only one item and it is the only item on the order. Thus far it appears Shopify is unable to accommodate this requirement. Any suggestions/solutions?