Without this information, the customer might not know what the invoice is for and not return payment. The customer's information. Include the customer's address, phone number, social security or tax ID number, and any other relevant information. When a customer sends you a payment, you'll know exactly whom it's from.
Most people advise filing taxes every year, even if you income is super-low, so that the IRS never has any extra reason to audit you. As I, a non-professional understand it: $3,300 is the minimum to have to file if you work for an employer and get a W2. $400 is the minimum if you're self employed. Also, if you're getting a tax refund, you MUST file. Most people advise filing taxes every year, even if you income is super-low, so that the IRS never has any extra reason to audit you. As I, a non-professional understand it: $3,300 is the minimum to have to file if you work for an employer and get a W2.
How much someone has to earn before being required to file a federal tax return depends on age and filing status, according to the IRS. For most taxpayers with a single filing status under 65 at the end of 2014, gross income must be at least  $10,150.