If you successfully filed (and received notification to that effect from within the TurboTax program) then it is likely your taxes are done and you do not need to mail anything in.
However in some cases you might receive a notification from the IRS stating that you need to mail in additional forms.
In the meantime you can track your E-File status through TurboTax and your Refund status directly from the IRS.
Please keep in mind that once filed TurboTax has NO control over the IRS processing time.
You can continue to check the status of your efile here: https://turbotax.intuit.com/tax-tools/efile-status-lookup/
You should be able to check your actual refund status at the IRS website: - https://www.irs.gov/refunds.