Representative assesse liablity for penalty

My father in law died before the last date of getting his account audited in 2020. My wife now want to file his return as representative assesse. Will she be liable to pay penalty of 1.5 lac for not getting accounts audited. As my father in law business turnover was 2.9 crore. But profit was only 7 lacs. As the actual work was job work. But due to gst was shown as purchase and sales. 

Are there any remedy. Please help.