What is the deadline for tax year individual income tax returns? · How do I cancel the payment and schedule it for a later date? · Do I need to file my tax. How do you cancel your EIN? Once an EIN is assigned, it will always be tied to your business. You can, however, close your tax account with. Make sure you understand how your business will pay tax, register for permits, Does everyone need a Federal Employer Identification Number (FEIN)?.