Hi after you setup your accounts as in QMcKay tutorial here SambaPOS Accounting you can then follow how i connected the inventory to accounts
Firstly create supplier entities, as entities can be anything,
My Entity Type
For custom fields add as you would like, i added Phone filed and Address field, under Accounting select Account type as the supplier account type you in @QMcKay’s tutorial i referred you too.
Under Entities add you entities, these will be your suppliers, add as many suppliers as you like, and these will be tied to corresponding actual accounts that you created under other tutorial
If we go back a notch under accounts in QMcKay tutorial you can create these supplier accounts that will align as options under account drop down above, You can see my accounts under Accounts
Create a transaction type that triggers when you purchase stock in inventory with the equivalent of the purchase transaction. This transaction type must debit the supplier account and credit which ever account you deem fit according to you business setup. in my case
Then i edit my purchase transaction document type under inventory to link it to the right entity type and account transaction type, this will also mean every time i use my purchase transaction in inventory i will have the suppliers entities to my disposal which are linked to there respective accounts.
At this moment your purchase under inventory must force you to select supplier otherwise they will not save
Let me know where you are not clear i will be glad to help further.