1. A computer-implemented system for generating a business valuation, comprising: a tangible computing processor; a network port in data communication with the processor that communicatively couples the processor to a network; a non-transitory computer readable storage device in data communication with the processor and having encoded thereon computer executable instructions which, when executed on the processor, implement: a graphical user interface that prompts a valuation requester to input information of a company, including general information, financial information, and presence information of the company, wherein the financial information includes information pertaining to deferred compensation certified to be in compliance with tax reporting requirements; a query engine that queries third party locations on the network for information related to the company; a valuation engine having a plurality of rules that calculates, in accordance with the plurality of rules, a business valuation of the company using the input company information and the information related to the company from the third party locations; a reporting engine that delivers the business valuation in a report; wherein the calculating the business valuation includes: determining a valuation multiplier based on at least one of a code that classifies business establishments according to a type of economic activity in Canada, Mexico, and the United States of America, a projected revenue growth, and a long term earnings before interest, taxes, depreciation and amortization (ebitda) margin; calculating a seller's discretionary earnings (SDE) as at least a sum of year-weighted averages of pretax income, owner salary, owner benefits, one-time benefits, interest expense, and one-time costs, wherein each respective weighted average is determined as a subject of variables y1, y2, and y3, wherein y1 is the value of the subject variable for the most recent year, y2 is the subject variable for the year immediately preceding y1, and y3 is the value of the subject variable for the year immediately preceding y2, and wherein w is determined by: if y1 is not provided, then w is zero; else if y1 is the only year provided, then w is y1; else if y1 and y2 are the only years provided, then w is (y1×R1)+(y2×R2); else if y1 and y3 are the only years provided, then w is (y1×R1)+(y2×R2); else if y1, y2, and y3 are all provided, then w is (y1×R3)+(y2×R4)+(y3×R5); wherein Rn is a predetermined ratio, and wherein the sum of all Rn for any w is 1; adjusting the calculated SDE for inflation and pre-tax growth, calculating an interim valuation based on a product of the adjusted SDE and the valuation multiplier; and calculating the valuation by applying to the interim valuation at least one of a negative valuation adjustment, a recurring revenue adjustment, an intellectual property adjustment, an adjustment based on sales to a select number of top customers as a percentage of total sales, an adjustment to subtract recent year debt, an adjustment to add recent year cash, an adjustment to subtract 50% of recent year depreciation, an adjustment to add recent year fixed assets, an adjustment to add 80% of recent year accounts receivable, and an adjustment to add 75% of recent year inventory.