Answer: a. $12,700
b. $0
Step-by-step explanation:
a. As Jasper and Crewella Dahvill filed joint tax returns in Year 2, both of them are joint and severally liable for any errors that may arise in the filing. The IRS could not find Crewella but they could find Jasper and as he is liable as well, he will have to pay the full amount that Crewella understated their tax liability by.
b. In year 3, Jasper and Crewella Dahvill had a strained relationship and filed their returns separately. As a result Jasper is not liable for any errors that will arise from Crewella's tax returns filing including the understatement of tax liability.