InfoPath Dev

 I know there's a way to do this cause I've done it before. Published the form to a SharePoint 2016 form library and now added a field on the form, I can't remember how to add the field so it's reflected in the SP library. I don't have to set up a new Data Connection do I?

Nope - Under File > Form Options, find promoted properties. Add your new column. Republish & it will be in your library. You may or may not need to add it to the view - can't remember if it is added to the default view or not. :-)

 Thanks Hilary, as helpful as ever!