Wow, that sucks.

I know there have been some 2210-F bugs reported but I thought they were all after 2/28 when IRS extended the time to pay.

Is it significant?  If we're talking $20, I'd either write the client a check or just knock it off the next billing, make some loud swearing noises about Intuit software, and move on with life.

Do you open and calc your returns right before transmitting?  I've run into cases in the past where something has changed from the time I printed the 8879 and the time I have signed forms ready to file so I always double check that the final numbers in the return match the 8879 before I transmit.

Rick