Of course surrendering your Citizenship or Residency relieves you of the necessity of filing US tax returns in future years except with respect to any of your future earnings the have a US source.
Step Two: You must then get final approval of the Internal Revenue Service. You must file a final US tax return (A Dual Status Return) and Form 8854 to determine if you owe an exit tax or not. If you are married, both you and your spouse must go through this procedure separately.
As an Attorney/ CPA I have advise and assisted over 70 clients with their US Citizenship or Green Card surrender. Let us help you. READ MORE DETAILS OF THE PROCEDURES HERE.