I helped my sister do her taxes this year, since it was her first year. We just used the H&R block software since that is what I used to mine.

They rejected her return because I kicked two of the numbers on the EIN of one of her employers. The rejection was quick too, as we got the email about 20 minutes after submitting the return.

I always knew that the IRS checked your return, but I always figured it was something that eventually happened. I didn't think they checked everything as you submitted it. I don't know why I though that. Guess I pictured the IRS computer as an old IBM S/360 with core memory that did everything in batches.