To create this category, add [[Category: 1940 US Census, Wilcox County, Alabama]] to a profile, save the profile (it will be a SAVE ANYWAY), then set it up following the example of another county in Alabama for the 1940 Census.
https://www.wikitree.com/index.php?title=Category:1940_US_Census%2C_Wilcox_County%2C_Alabama&action=edit if you open that and copy the text, but change to Choctaw instead of Wilcox County, you'll be able to create these with ease. try it, and if you need further help, let me know.