Now that you’ve linked your stock, when you sell your item the available stock will decreased by the quantity that you enter. The same process can apply in reverse to Purchases that you make, meaning when you buy more of this product the available stock can increase.
To record a purchase that increases your stock, simply raise a receipt in the usual way and select the item Outgoing Type and/or Sub-Outgoing Type. When you’ve added the item you’ll see Receiving Stock section appear on the receipt detailing what you’ve purchases and how much.
When you take delivery of the goods click the Receive Now button. The stock will then be immediately updated in Tally.