Your age doesn't matter. If you are 65 or older you need to file if you have income over Single $15,700 or Joint $30,700 not counting Social Security. Or if you have a 1099NEC or self employment income or have health insurance from the MarketPlace (ACA, Obamacare)
Do you need to file a return?
https://ttlc.intuit.com/community/filing-and-paying-taxes/help/do-i-need-to-file-a-federal-return-th...
