Student loan payments are not entered on your tax return. If you paid interest on the student loan, you can enter the interest from your 1098E.
WHERE DO I ENTER STUDENT LOAN INTEREST
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/enter-student-loa...
As for entering a car payment-----are you self-employed? If you are referring to a car payment for your personal use vehicle, there is nothing to enter about the car.
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