Thank you Phoebe. Section 448(c) appears to be related to whether or not the taxpayer is permitted to use the cash method of accounting. 

I'm just confused as to where that number would go in Lacerte. Someone suggested that it is a 199A(g) deduction. This is definitely not the case, and I'm confused as to where this number (over $40k) in my client's case would go if it's related to the method of accounting.