Finding out taxable income at the end of the year

[H0wdy]

Hello everyone,


I do invoices throughout the year and have the income go to
income:sales.  However, I don't necessarily get paid in full for the
invoices, so at the end of the year, I cannot look in income:sales to
determine how much taxable income I report, because it would include how
much I'm owed also.


As such, what is the best way to find out how much taxable income I make
per year to report on my taxes?


T/y