What is included in statetax and fedtax?

What taxes are included in statetax and fedtax? How are these variables calculated?

All tax variables are calculated by the Census Bureau and copy directly into the IPUMS-CPS ASEC supplement files. After a change in 2004, the Census Bureau released a report detailing their new model for producing tax estimates, this report should provide all the information you need as to how the figures are calculated.

I hope this helps.