It would be very difficult to give you a step by step guide to enter a back door Roth in ProSeries. First you must have a good understanding of what a backdoor Roth is, and why people do them. You must know if client has any traditionally Ira's anywhere, and also if he has a basis in any of them. You start the process by entering the 1099R that he will receive, and fill out the 1099R worksheet. Be sure and go all the way down the worksheet to the bottom, answering all questions that apply. Keep filling all necessary worksheets until you get the answer on the 1040 line 4b that you expect. If he has NO traditionally Ira's any where except the one he contributed to and recharacterized. you would expect 1040 line 4b to be "0" if he has other Trad. Ira's it will not be "0"