If the e-filing is "rejected" by the IRS, then the credit card shows the amount as "pending". If you eventually get the e-filing "accepted", I assume the payment is now "posted" and it will show up on your credit card statement. In my case, we could not correct the e-file so we filed a mail return. Eventually, (just a few days after the filing deadline), the "pending" charge was removed from the credit card account.
