How do I prove I paid? I got aCP14 for amount i paid at filing. I can see amount in bank, what do I do? cannot get through on phone

Refer to the TurboTax Help article at the link below.

https://ttlc.intuit.com/community/irs/help/i-got-a-cp14-notice-from-the-irs/00/27160

Simply write back it was paid and attach proof of payment. 

proof of payment would be copy of bank statement and copy of front and back of check.