SKULabs imports each Shift4Shop (formerly 3dcart) variant from the product's Advanced Options, and uses each variant's Code as its SKU. To give every variant its own SKU in Shift4Shop, follow these steps.
Step 1: Make each option set required
First, make sure each option set of the product (for example Size or Color) is a Required option.
1. Go to Products > Product List.
2. Click the name of the product you want to edit.
3. Open the Options tab.
4. Click Edit at the top right of an option set.
The Edit link on an option set in Shift4Shop.
5. Check Required.
The Edit Option window in Shift4Shop, with Required checked.
6. Click Save.
7. Repeat for each option set.
Step 2: Enter a SKU for each variant in Advanced Options
1. At the top of the product page, click Actions > Advanced Options.
Actions > Advanced Options on a Shift4Shop product.
2. Select the checkboxes to the left of the variant rows.
3. Enter a unique SKU in the Code column for each variant.
Advanced Options in Shift4Shop: each checked variant has its own SKU in the Code column.
4. Click Save.
Then run a listings sync in SKULabs to import the variants with their new SKUs. To learn more about product options in Shift4Shop, see How to set up product options (Shift4Shop).