You need to consult with a tax attorney who has experience in handling U.S. citizens who renounce their U.S. citizenship.
TurboTax does not support Form 1040-NR (although Sprintax does).
See https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-forms/turbotax-handle-form-1040-nr-n...
Essentially, however, the primary difference between "covered" and "non-covered" is whether you owe the "exit tax" (which is primarily based on your net worth and past 5-year tax liability).
