Bad debt reserve
166
State tax deduction
164
Charitable contribution
170
Start-up cost addback/amortization
195
Installment sale
453
Earnout payment
1.197-2(f)(2)
Worthless stock
165(g)
Success-based fee
Rev. Proc. 2011-29
Accrued audit and tax fee
Rev. Ruling 2007-3
Bond discount or premium
171