@KevinNg131
So the federal taxable income was negated by the standard or itemized deduction on the form 1040. So you had nothing for the EV credit to reduce. You may have used the actual expenses for the business use of the EV so you got a deduction on the Sch C that normal employees don't get ... so you are ahead of the game on them this way.
You still owe the SE taxes just like an employee has FICA taxes withheld from their paychecks. Why do you think you don't have to pay them like everyone else? The EV credit only reduces the federal income tax and not any of the other taxes the IRS collects on the form 1040 like the SE taxes. Note how the lines are placed on the 1040 ... it is one long math problem and you must follow the format as written by congress. Congress made the credit non refundable and placed it on the form 1040 like it is ... so if you want to cry foul talk to your local congress person.
