You and your wife should file a joint return.
Married Filing Jointly is usually better, even if one spouse had little or no income. When you file a joint return, you and your spouse will get the married filing jointly standard deduction of $24,400 (+$1300 for each spouse 65 or older) You are eligible for more credits including education credits, earned income credit, child and dependent care credit, and a larger income limit to receive the child tax credit.
As for your son---you did not mention how old he is---but you say he is a full-time student. If he was under the age of 24 at the end of 2019 then he can be claimed as your dependent on your joint return. He can file his own tax return to seek a tax refund, but must say on his return that he can be claimed as someone else's dependent.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
