The most accurate and popular 1040 Tax Firm' email format is {first}{last} (ex. JohnSmith@1040taxfirm.com).
1040 Tax Firm also uses (ex. John@1040taxfirm.com ) and {first} (ex. John_Smith@1040taxfirm.com ) and {first}_{last} as email structures. 1040 Tax Firm's uses up to 3 different email patterns.