This post is part of the In Microsoft Dynamics 365 Business Central (Purchasing), how do I… series and of the wider In Microsoft Dynamics 365 Business Central, how do I… series which I am posting as I familiarise myself with Microsoft Dynamics 365 Business Central.
The setup of specific posting groups tends to be simpler than the general posting groups, in that there is only one page in which you need to enter data.
Do create one, search for vendor posting groups: