Here is all the information regarding the W-10 tax form from the IRS. But, it is a request to get your Childu2019s Dependent Care Tax Information. If you are taking care of someoneu2019s child for them you will need to fill it out. Again you are supposed to pay taxes on all Earned Income. But, a lot of people donu2019t and work under the table. I donu2019t know many drug dealers getting ready to report their earnings this year. I actually used that scenario in college. You canu2019t right off bribes as an expense.. Sorry off topic..About Form W10 | Internal Revenue Service