[GNC] how to create monthly revenue and expense report for just one year

[Eric Hammond]

I record revenue and expenses separately (here income is revenue - expenses)
I need to create an "income and expense" report, only last year, for my yearly business taxes.
A simple two-line report would be ok, I would prefer to have it by month.
 I do not find such in the Reports menu, nor can I alter the allowed reports.
How do I create this report?

Thank you for the help,
Eric Hammond