If I have three bachelor's degrees, should I still enter only one bachelor's degree as my highest certification in the application?

Yes, when an application asks for your highest qualification in a single dropdown, you select Bachelor's Degree, because that field measures academic tier, associate, bachelor's, master's, doctorate, rather than how many degrees you hold at that tier. Having three bachelor's degrees does not change your highest tier, but it absolutely deserves visibility elsewhere in your application.

Where Each Piece of Information Goes

Practical Tips for Filling These Forms

• Use the Add Another Degree or Add Education option most application tracking systems provide to list every degree
• Order your degrees by relevance to the role, or use reverse-chronological order if relevance is unclear
• Mention the combination of your degrees in your cover letter if it strengthens your case for the specific role
• Double check the system for a hidden multi-entry option before assuming only one degree can be listed

My Advice

Do not let a single dropdown field make you think your other two degrees do not matter, take the extra few minutes to add every degree individually in the education history section and reference the combination in your cover letter if it is relevant to the job. If you are stuck finding where to add extra entries in a specific applicant tracking system, check for an Add Another Degree button before assuming the form only allows one.