How do I turn off inventory sync for specific products?

You can turn off inventory sync for individual products in Sumtracker. When Inventory Sync if off for the products, Sumtracker will not sync its inventory to your store. You can change this setting at any time.

Steps to do this from Product List 

Open Products List > Select the product from leftmost column checkboxes > From Bulk Action menu, select Turn Inventory Sync off

Bulk Actions button only appears when you select the products

Screenshots

Steps to do this in bulk (using CSV import)

Step 1 - Export the list

Step 2 - Open the exported sheet and edit the tracking type column

Step 3 - Import the sheet 

That's it!

Now inventory of all products that are NOT_TRACKED will not be updated by Sumtracker to your store.