In the interview, you will come to a screen that asks what the sources are: 1099-MISC, 1099-K, cash or checks, etc. Click on the cash button and continue - you will be able to enter the name of the source of the cash and how much it was.
As you continue the interview, you will be asked if you had any business expenses. If you do, you may be asked to upgrade, but, of course, the expenses reduce your income and your tax so it usually works out better for you.
The W-2 is entered the normal way under Wages & Income.