Business Expense Deduction
I run my business on a cash accounting basis. As a result of a problem with the mail, I did not receive my property tax bill until after Christmas in 2018. The payment was due in October. I paid it in January 2019. Is the amount deductible (as a business vehicle expense) on the 2018 return or must I wait until I file 2019? (I suspect I know the answer but I thought I would check nevertheless.)