Where can I find approved vendor tools for calculating self-employment income?

The lender may use a Fannie Mae-approved vendor tool to complete the written analysis and calculate self-employment income. The lender may receive representation and warranty enforcement relief of the calculated amount if certain requirements are met. See A2-2-04, Limited Waiver and Enforcement Relief of Representations and Warranties for Mortgages Submitted to DU and Fannie Mae’s website for the list of Approved Vendor Tools.  

For additional information, see B3-3.2-01, Underwriting Factors and Documentation for a Self-Employed Borrower.