I am 16 years old and started working about an year and a half ago, all my friends are doing their taxes but me, this is because my mom said that, is it true?

[demian2357]

I worked at a Qdoba like 3-4 days a week and all week in the summer of 2020

[Mike9241]

You must file a return if any of the following apply.
• Your unearned income was over $1,100.
• Your earned income was over $12,400.
• Your gross income was more than the larger of—
• $1,100, or
• Your earned income (up to $12,050) plus $350.

you must also file if

You had net earnings from self-employment (you should have gotten form 1099-NEC if paid more than $600 by any one "employer" ) of at least $400.  

[mesquitebean]

If you are a W-2 employee, you'd also need to file a return if you want to get any withholding back that was taken out of your pay, i.e., a tax refund.