For 2XX7, Keesha's shop had its best year ever, which is good because Keesha had no other sources of income. Keesha reported gross sales of $200,000. When Keesha gave you the cost of goods sold figure to prepare the return, she did not realize that she double-counted the cost of some items when her vendor issued multiple confusing invoices so the cost of goods sold was inflated by $53,000. You E-filed Keesha 2XX7 Form 1040, which included her business activity on Schedule C, on April 15, 2XX8. Same facts as above. If Keesha is audited and the IRS determines there is a deficiency of $20,000. 

a) What penalties, if any, may the IRS assert against Keesha. Code sections aren't required, but they can save a lot of time.?

b) What penalties, if any, may the IRS assert against you, Keesha's preparer?