They don't have to send you a 1099Misc for less than $600. You need to file $400 or more on schedule C/C-EZ or less than $400 as Other Income. You don't need to get an actual 1099Misc form to report self employment.
How to enter income from Self Employment
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
