Declare upcoming income

Giroin

How can I declare upcoming income that can be appear on my reports. For more information on my business model read the example.

It's income that will be available on my bank account in few weeks or months maybe. When it will arrive some of it will be transferred to vendors and some of it will be invoiced as normal. It's about a travel website that expects payments form a travel channel for a confirmed reservation. We only got paid on arrival date and we need to pay back the vendor as well as issue an invoice for our commission. I need the income to be at the reports as "money coming" or future income.

Thanks for your support
Giorgos