How to account for deductions pre bank depositing income?

When you get the payment you also should get an account explanation which shows now much the total was and each expense deduction.

You enter it the same way for the parent company as a customer, create the items as needed to point to the expense accounts.  Use a sales receipt

line one: your revenue item and the full amount earned

line two: an expense item, qty is negative one, and the amount

line three through .... more expense items entered the same way

The sales receipt will net to the amount actually received

In make deposits you can add other accounts and amounts and just overwrite the amount of the main item - assuming when you say category you mean account

Hi @Rustler !

Thank you so much. I got the receipt itemization part but I'm still stuck on getting the deductions into an account. I've added the account names in the chart of accounts but how do assign the deduction amounts to that account?

Thanks again!

After you create those expense accounts, then you create a service item per account that is linked to the expense account.  Use those items