You don't need to amend or change the estimates. They didn't get sent with your return to the IRS and the IRS won't be expecting them. They are just suggestions. They don't affect your return. You can shred them and ignore them.
THEY ARE OPTIONAL TO PAY.
If you are receiving a refund or low tax due and Turbo Tax prepared the vouchers then your tax liability was probably reduced by credits. They might have printed out if you got a one time large income this year like if you took a IRA or 401k distribution.
