Hi @JJudd Welcome to the community and thanks for posting your first question!  If using the 1099-INT screen it should detail the interest on the Sch B and then generate a statement if there are too many to fit on Sch B. This however will prbably not give you a full break down of the calculation. We would take a look at diagnostics in the Check return tab to see if there is anything showing that might help with what you are seeing. Also here are some helpful articles that may assist:

How to resolve ProConnect diagnostic Ref 37488 - Adjustment attributable to municipal bond interest

Entering an Original Issue Discount (Form 1099-OID) in ProConnect Tax

Entering Form 1099-INT interest income in the Individual module in ProConnect Tax

If after reviewing the articles above, you need further assistance please reach out to ProConnect Support. They would be able to assist you with this and you would be able to send the file in for review.