https://markets.businessinsider.com/news/stocks/zip-tax-unveils-next-generation-sales-tax-platform-1034371964
zip.tax Unveils Next-Generation Sales Tax Platform | Markets Insider
zip.tax has unveiled its next-generation Sales Tax API Platform, featuring improved precision for unincorporated areas and special tax districts...
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https://www.irs.gov/newsroom/taxpayers-can-zip-over-to-irsgov-for-answers-to-many-tax-questions
Taxpayers can zip over to IRS.gov for answers to many tax questions | Internal Revenue Service
Tax Tip 2019-19, March 6, 2019