The tax deal revived the option to deduct state sales taxes instead of income taxes for 2012 and 2013 -- great news if you live in one of the nine income tax-free states, including Texas, Florida, and Washington.
No problem if you didn't keep every sales slip for the year -- the IRS provides a figure based on your income.
If you made a big-ticket purchase like a car or boat last year, dig up that receipt. You can add the sales tax you paid to the IRS base.
Even in low-tax states, run the numbers using the sales-tax-deduction calculator at irs.gov.
How to avoid catching the attention of the IRS.