Amazon SP-API Transactions

Hi..

I’m trying to identify the best way to retrieve sales/returns for each sku and get fees/taxes/etc to calculate the profit.. and I’m really confused what I’m suppose to get.. I have tried using settlement reports but I’m not able to get these on daily basis.. What someone else uses it to get this kind of information or do you rely on settlement report and just do it every 2 weeks or so?

Appreciate any help!