In supplier bank section under additional info, need to make account name field mandatory

Summary:

In supplier registration process, under additional information where bank section details are present, I want to make a few fields mandatory (like account name), a few fields not mandatory and want to hide few fields.

Content (please ensure you mask any confidential information):

In supplier registration process, under additional information where bank section details are present, I want to make a few fields mandatory (like account name), a few fields not mandatory and want to hide few fields. I tried doing this using sandbox, but it did not work. How can this be achieved ?

Version (include the version you are using, if applicable):