https://www.infopathdev.com:443/forums/39.aspxNew to InfoPath? Search to see if your question has already been answered. If it has not, then ask it here or the appropriate topic forum.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/123186.aspxTue, 07 Jul 2020 16:15:34 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:123186Hilary Stoupa0https://www.infopathdev.com:443/forums/thread/123186.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=123186You'll have to add a data connection to the library the form submits to. You can then, in rules, as part of the submit rules, query the library to get a count of items. Then you can use a concat formula to prepend leading zeros to the count - sample formula can be found in this thread: https://www.infopathdev.com/forums/t/20643.aspx. Keep in mind that this is not 100% guaranteed to get you unique numbers - it might be possible for two users to be submitting at the same time, and for the count to be the same.https://www.infopathdev.com:443/forums/thread/123181.aspxFri, 03 Jul 2020 16:10:51 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:123181hainh19840https://www.infopathdev.com:443/forums/thread/123181.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=123181Dear Support, I would like to create a field to show number ( Ex: 0001, 0002,....) when user open new form. Could you please help me to do this. Attached file is sample.