I have an asset I converted to a "lending loan". There is no "Interest" category as can be seen in this attached scrubed picture. I do read that in Loans there may be a place to change the interest category (which is loosly how this "lending loans" was made) but the exact location to change in Quicken has eluded me. Please take a look.
Steps to create problem.
Make a manual Asset account in quicken
Use the gear (settings) menu in the account to "Convert to a Lending Loan"
Try to modify the "Interest Category" either during the creation of the "Lending Loan" or post creation.
Thank you