Source: U.S. Census Bureau  

Release: Monthly Retail Trade and Food Services  

Units:  Millions of Dollars, Seasonally Adjusted

Frequency:  Monthly

The most recent month's value of the advance estimate based on data from a subsample of firms from the larger Monthly Retail Trade Survey is available at https://fred.stlouisfed.org/series/RSGASS

Information about the Monthly Retail Trade Survey can be found on the Census website at https://www.census.gov/retail/mrts/about_the_surveys.html