Beginning in Tax Year 2009 (Calendar Year 2010), the IRS will verify the accuracy of the following field positions :
(1) If field position 26 in the “A” record contains a “1,” then field positions 747-748 in the “B” record must contain a valid state code or blanks.
(2) If the “B” record contains a state code in field positions 747-748, then the “A” record must contain a “1″ in field position 26.