This is the article you're looking for. 

https://proconnect.intuit.com/support/en-us/help-article/form-1099-misc/enter-amounts-1099-misc/L9JQ...

Here's the excerpt that is particularly important:

Important: Income amounts entered on this screen will not flow to the tax returns. You must follow the steps for the other box amounts you received in this article in addition to completing this screen when withholding is present.

However, federal and state tax withheld entered on this screen do flow to the appropriate line of the tax return (Form 1040, line 25b, for federal amounts). This withholding should not be duplicated or re-entered anywhere else in the tax return.

If your client has one or more 1099-K, have a ball reconciling the revenue to make sure there's no duplication or omission.