Um how about businesses, corporations, sole proprietorships, partnerships,LLC, etc..they have to try and understand the complex tax laws to take advantage of breaks and avoid pitfalls. To do this properly requires professional pre-tax planning...compliance is not just about filing a simple return, it is figuring out how to most effectively avoid (not evade) paying taxes using legitimate (but sometimes complex) tax regulations. Take a look at how many Tax lawyers and Tax Accountants there are, they are not just filing 1040's..oh don't forget the recordleeping for IRS and then filling out complex business returns and audits...fabrication of what? http://ntj.tax.org/wwtax/ntjrec.nsf/EEA087F6813237A585256863004A5933/$FILE/v50n3487.pdf
The total amount spent on federal tax compliance is about 13 percent of the total HP Corporate Tax Department budget. It is interesting to note that HPs total costs of local (U.S.) sales and use tax compliance exceed its federal income tax compliance costs.