If you're trying to figure out what a client's earlier year's sales tax amount was to determine taxable amount for a state refund, use the IRS Sales Tax Deduction calculation page.
TaxSlayer Note:
TaxSlayer uses the zip code to determine the letter code for the local sales tax table and is not always correct.
If the taxpayer's zip code corresponds to a city with a letter code that is different than the county
and the taxpayer resides outside the city limits,
Enter a zipcode in the TS Sales Tax Worksheet that corresponds to another city
with the same letter code as the county.