Education

Okay, thank you. 

 

If you miss a quarterly payment (clearly I missed the 3rd quarter because I did not receive income until the date that the quarterly payment was due), can I pay a 'late' quarterly payment, or should I wait until the 4th quarterly payment date to send anything to the IRS? 

 

If I overestimate my taxes owed, and send an overpayment for my quarterly payment, is this included as a credit on my annual tax return?