Closing sign ups for CSA shares

Go to the product listing settings for your share. If you want to remove the product from the storefront altogether, click on "Edit Product" and turn the status to offline. This will remove the CSA share listing from the storefront.

If you want to start a waitlist, click on "Edit SKUs" and in each individual SKU change it to no stock. Then there will be this waiting list button in the storefront.