from an expense account (profit and loss statement implication) to a liability account (balance sheet implication). To illustrate sales tax, if company XYZ, Inc. purchased $40 of office supplies from an in-state vendor that collected $10 of sales tax: To illustrate use tax, if company XYZ, Inc. purchased $40 of office supplies from an out-of-state vendor that did not collect sales tax, use tax is self-assessed: The U.S. Census Bureau reported in 2014, $271.3 billion dollars in sales and gross receipts were collected by the 45 states that collect sales and use taxes; 33 of the 45 states increased collections year over year. Sales and use taxes combined account for 32% of all taxes collected by all states, second only to personal income tax collections. The states themselves maintain that use tax collections are the second leading cause of tax deficiencies under audit. Enforcement In 2007, 22 states, including New York, California, Ohio and Virginia have included an entry on their state individual income tax return for taxpayers to voluntarily calculate an amount for use tax liability. Taxpayers, however, have been reluctant to pay taxes to the state. A few of these states have tried another approach by pre-determining the tax liability owed by every taxpayer by a tax table based on the individual's adjusted gross income. For example, a Michigan taxpayer with $45,000 of income can use the state's use tax table to estimate his use tax liability as $36. However, use of this table is limited to purchases of less than $1,000 and may be challenged during an audit. For purchases over $1,000, the taxpayer must calculate the tax for each item and add this amount to the use tax from the table. States using this method have seen an increase in voluntary compliance over those states that have the taxpayers calculate the use tax themselves. As the amount of e-commerce sales continues to rise ($34 billion for just the second quarter of 2008) states recognize that the key to collecting these taxes rests not only in educating the individual taxpayer but with coordinating their efforts with other states. Currently, there are 19 full member states and 3 associate member states that belong to the Streamlined Sales Tax Project (SSTP). The SSTP assists states in collection of sales and use tax by registering merchants who charge out-of-state consumers the appropriate state sales tax and remit the tax to