Hi José,
For your requirement, You need to mention the taxes while defining the product itself. In Products screen, you will be having a Page named 'Accounting' in which you can see customer taxes and supplier taxes. you can add multiple taxes in those fields as they are many2many fields. The taxes must be defined in the following menu
Accounting --> Configuration --> Taxes --> Taxes
The taxes can be defined as a static value or percentage also. The Tax T1, create it as 'Tax Type': Percentage, value below that as 0.1. Create Tax T2 as 'Tax Type': Fixed Amount and value as $1.93. Make sure that the field 'Tax included in Price' is unchecked.
For Different Products, you need to create different Fixed taxes and mention in the products accordingly. Once you select the product in order_lines, the taxes will be reflected automatically.