If you have W2 income of $6200 with no withholding (hence no need to file taxes for a refund) but would like to put all $6200 of earnings into a ROTH IRA, you can still do so without filing a tax return correct? In other words, contributing to a ROTH IRA only requires that you prove earned income if you get audited by the IRS for this, there is no need to file a return or even send in an 8606 for ROTH Contributions as they are not really listed anywhere, correct?

Thank you!