I'm saying the only way to be eligible to claim the credit, as a taxpayer, is if the Aunt is disabled.

Correct solution - If she's not disabled, no credit.

Review the instructions for Form 2441 at IRS.gov, before you declare what the Tax code states.

Forcing the software to create a credit that the taxpayer is not eligible to claim is fraud, and truly unacceptable to the IRS.

All tax credits have specific eligibility requirements which must be met in order to claim them.