After the products get added, click on product name to modify product price, tax & discounts.
NOTE: Option for different tax in products will be shown only if Inline tax is enabled.
Users can enable it from, Business Settings - Tax - Enable Inline Tax in purchase and sell
Figure 65 – Enable Inline Tax in purchase & sell

Selecting Lot number for a product
If lot number is enabled, then it will show the option to select lot number. – refer to Enabling Lot number under products

Selecting Expiry for a product
Expiry Date: If the expiry date is enabled then it will show the option to select lot number. – refer to Enabling expiry under products
Figure 66 – Product Lot / Expiry Details