i filled an i-539 for j1 to b2 visa on feb 1, my visa ends on march 25, 2018. i just received receipt number, can i wait in us till i get decision?

Individuals who timely file changes of status in the U. S. from J-1 to B-2 are allowed to remain in the country while awaiting a decision from U.S.C.I.S. The downside is that when U.S.C.I.S. makes a decision after the date of authorized nonimmigrant stay, and that decision is unfavorable, the applicant is considered out of status as of the date of authorized stay – in your case, March 26, 2018 (unless you failed to count the grace period, in which case your nonimmigrant stay would actually expire on April 25, 2018). Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.