How can I add a recently purchased shipped items into my existing stock?

Very good software with easy customizing options. Keep studying each guides, but I couldn’t find a solution for the below requirement.
How can I add a recently purchased shipped items into my existing stock?

Use either a purchase invoice or simple Spend money transaction. Allocate the transaction to the inventory item. When you create the completed form, it will adjust your inventory count.

Thank you so much…
My inventory items were not updating with new Purchase invoices. But now I updated the software into the latest version, and then it is working perfect.

Thanks manager team