From the CBO link in reply #2 you can find the tax shares with respect to family income shares, as well as many other applicable measures presented in time series tables.
http://www.cbo.gov/showdoc.cfm?index=1545&from=4&sequence=0
To answer your question in 1999 the
Top 5%:
accounts for 27% of the total family income and
paid 37% of total federal taxes(individual, payroll, corporate, estates etc.)
Top 1%
accounts for 15% of the total family income and
paid 21% of total federal taxes.
Another statistical source more detailed tax, income, expenditure, home ownership etc. information arranged in annual ftp folders for 1984 through 2000 though the narrowest slice is quintile data:
ftp://ftp.bls.gov/pub/special.requests/ce/standard/
paid 37% of total federal taxes(individual, payroll, corporate, estates etc.)...corporate taxes should be removed from the totals I am interested in. My taxes reflect the activities of my sole proprietorship and my farm because I am the account by which all of the reckoning is done. Corporations may be 'persons' but I am only interested in 'natural persons'.