First, Create a Ledger under Sundry Debtors by Name AMAZON, and in the GSTIN Details, enable "Is ECommerce Operator".
It is preferable to create a New Voucher Type in Sales called "Amazon Sales", with MAnual Numbering and Prevent Duplicates to "YES"
First you have to print the invoice from Amazon Portal, and in Tally enter the details as per the Amazon Invoice, enter the same Invoice Number and Invoice Date, Select Party as Amazon, and in the Buyer details enter the consumer / buyer details. In the Item details, select the relevant item. Enter the value as per the Amazon Portal Invoice, You need not reduce the amazon commission now, You can similarly record all the amazon sales in this manner.
When you receive payment from Amazon in your Bank, you need to just enter the value received.
Now, at the end of the month, Amazon will issue a commission invoice to you. This invoice you can enter in Purchase Voucher, with the necessary TDS.
This will match the Amazon ledger