I am filing MA state tax return and want to claim the lead compliance credit for deleading my property. While I am filling the info on the turbo tax online, it took me to the schedule CMS, and on the section 3a it asked for the "federal ID # of credit source ". I am not able to find and federal ID # of credit source for the lead paint. Turbox tax online is not allowing to leave this blank and I am not able to proceed further. Does anyone know this or this should be my SSN?