I have used H & R Block tax preparation software for a number of years and had very good results doing my simple returns. I have never had a problem with the IRS whether filing hard copies via USPS on line.
I have used H&R Block for my taxes for many years. It is easy to use. I like that my prior year's information is there as a reminder to review so I do not forget something. I also like that the entire process is paperless.