Quantiferon

I apply for immigration to the United States ('m actually going through the process) and I've been tested + for the QuantiFERON TB. How do I get the waiver? Any info on this particular subject is welcome.Is there place I can chat with a lawyer free of charge or something like that.
Thank you

You must be able to demonstrate that you have tried / are seeking treatment for infectious diseases. At this point, you must file Form I-690 (and supplement) with the USCIS office that has primary jurisdiction over your request.

http://www.visapro.com/Download/INS-Form ...