Is the federal tax id your EIN number?
EIN stands for “Employer Identification Number”, and is often called FEIN (“F” for “Federal”). IRS uses this number as the tax ID for companies.
However, in some cases your company’s tax ID would be your Social Security Number, for example for sole proprietorships or single-member LLCs with no employees.
(a) You made a typo in the card number, CCV code, expiration date, name or address;
(b) Your card balance is too low;
(c) Issuing bank has declined this transaction for some other reason related to your account.