Key + = Replace with definer as appropriate. Available Definer Codes are listed on the summary screens.nn-nnnnnnn = EINnnyyyymm = MFT code and Tax Period.BMFOL+nn-nnnnnnn E - Entity informationI - Index (Summary)L - Last period satisfiedO - Exempt Organization dataP - Page requestV - Vestigial data (retention register)Z - Audit history dataBMFOL+nn-nnnnnnn nnyyyymmA - Adjustment TransactionM - On-line request from MRSR - Posted returnS - Status history dataT - Tax module informationU - CAWRBMFOL+H - Help screenBRTVU nn-nnnnnnn nnyyyymmR1 - R6 - Screens 1-6 of ReturnM1 - Form 3800SA - Schedule ASF - Schedule FSJ - Schedule JSK - Schedule KSL - Schedule LSM - Summary ScreenT3 - Form 4626V1 - Form 8609V2 - Form 8586W1 - Form 8611Y1 - Form 8693Definer Codes used are listed on summary screen.IRPTR+ and under that Blank Access ScreenO - Online RequestE - Payee ScreenR - Payer ScreenH - Help S - Summary.INOLE+nn-nnnnnnnG - TIN type unknown (with no hyphen)T - When TIN known, file source unknownS - Specific-File Source code knownX - No MF account, cross-reference informationP - With EIN, File Source, Plan # (EPMF)Note: To specify the type of TIN requested, enter File Source Code immediately after the TIN. The codes are:BLANK - BMF valid EIND - Temporary TINN - NMFV - BMF valid SSNW - BMF invalid SSNP - IRAF or EPMF valid SSN or EINX - IRAF invalid SSN or EPMF invalid EIN