How to tally for e-commerce sales.

hi, 

my name is amit and i am very new to accounts and tally as well.

i have a lot of doubts on how to work with tally for accounting online sales on ecommerce websites.

lets start with a example with which alot of questions arose in my mind.

1. i am selling a product "xyz" on a ecommerce website "PQR"

so how do i start with tally.what all ledgers i need to create and how the transaction is billed in tally.

2.i am selling on "PQR" but the buyer is "MNO" so how do i create a sales voucher, because i will be getting money from "PQR" and not from  " MNO" but the billing should be done on "MNO".

so with doubt no 2. what all group items ledgers and sales voucher are created accordingle.

3. i am selling product "XYZ" which includes all the taxes and shipping fees and packing charges and handling charges for a fixed amount of "abc.xy" but the shipping is taken care by the "PQR". so how do i input the necessary things in tally with all the data.

lets start with these 3 doubts .

but trust me i have many more doubts which i dont even know how to describe them accordingly.