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 each receive the $4050 personal exemption, plus the married filing jointly standard deduction of $12,600 (add $1250 for each spouse over the age of 65).
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.
You file a Joint return with your wife. If your son is under 24 you can claim him as a dependent.
You don't include his income on your return. It would only go on his return if they are required to file one. To file a separate return for your dependent you need to set up a new account. Online is only good for one return per account. You can use the same email address for 5 accounts.
Be sure on their return they check the box that says they can be claimed on someone else’s return. If their only income is W2 and under 12,200 they do not have to file a return except to get back any withholding taken out.