Filing under $10,000

Hi,

I have a couple of questions,(a little background) I worked at one job (Job A) in 2019 at the beginning of the year for about three months (resigned), found another job (Job B)  and have  made less than $10,000 at each of these jobs...
 
 
So my question is do I need to file a tax return for the jobs that I have made less than $10,000?
 
Or can I file the one W2 that I have made more than $10,000?
 
Heeelllpppp