On page A-4 of the link you provided, it mentioned that if you wanted to use actual expenses for the sales tax deduction that "You must keep your actual receipts showing general sales taxes paid to use this method." That seems to imply that you can't use credit card end of the year statements to ballpark/estimate the sales tax paid. If that's true, seems like a lot of work to keep every single receipt and to add them all up... you would think at least this is a good estimate though in an audit and the IRS would just tell you the difference of what they think is deductible from your credit card statements or will they demand the receipts and if you don't have it, you can't take any sales tax deductions at all?
