When splitting a package or using inline repackaging when creating a Sales Order, you'll see a new toggle button that allows auto-filling of package tags! Simply select the first tag manually and then any subsequent tag fields will be auto-filled with the next available tag.
Split Package Dialog
Select Metrc Item
New button - auto fill metrc using next tag in series, Click to enable
Click the new toggle (click again to change the order the tags populate in either ascending or descending order indicated by the direction the arrow is pointing and the order of numbers, either 1-to-9 or 9-to-1)
Select first package and the lines below will auto fill the next available tag.
Even when toggled you can still can change numbers manually if needed
Inline Repackaging Form
Create Sales Order
Add Line Item
New toggle available on every line
Select Metrc tag
Click tag icon next to tag number
Inline Repackaging form expands as usual
When toggled, the lines will autofill with the next available package tag
Un-toggle and change manually if needed
Works across multiple order items !