what under what situations can I not file a return

[smreed48]

If I owe $0 taxes and have no withholdings,  is there a threshold where I am required to file a return.  Is there any situations where I am not required to file a return. I have social security and $10000 in investment income

[VolvoGirl]

Isn't it letting you file?  You might need a form that's not ready yet.  Do you get any message?

The IRS has not finalized all the forms yet.  Federal tax form Availability table

https://ttlc.intuit.com/community/forms/help/irs-forms-availability-table-for-turbotax-individual-pe...

Even when the IRS finalizes the Forms you need and Even if Turbo Tax lets you submit your return they will just hold all the returns until the IRS opens filing on Feb 12.  So there is no hurry.  And a lot of people who file early find out they have to amend later like when they get their actual W2 and 1099 forms.  Or they get more forms than they were expecting.