What if I cleaned houses on the side and they never gave me a 1099

If you were self employed they would not have to give you a 1099. You can still report your cash income. 

You will have to report the income made cleaning houses as self-employment income:

1. Login to your TurboTax Account 
2. Click on "Search" on the top right and type “self-employed”
3. Click on “Jump to self-employed”
4. Select "Other self-employed income, includes 1099-K, cash, and check" on the "Let's enter the income" screen
5. Enter "Cash" as type of income and the amount received

Please see What is the self-employment tax? and  What self-employed expenses can I deduct? for additional information.

Home owners do not have to give you a 1099.  Only businesses are require to issue 1099s.  You are expected to report your income (and your expenses) from you own records.