In New York State, when a business purchases goods or services and the supplier does not directly collect sales tax, the business is generally obligated to pay use tax. However, the finance office of a company discovered that its company had not paid use tax on any supplier purchases where sales tax was not directly collected. The financial officer consulted the company's accounting firm, and the advice received was: "We should pay, but I am not worried because I have kept receipts for sales tax paid on some goods used in research and development projects." In New York State, for purchases that should not be subject to sales tax, businesses typically need to file Form AU11 to apply for a refund. The CPA believed that the sales tax paid on research and development projects could serve as a bargaining chip in a sales tax audit. The question is: Is this advice reasonable?

First, the legal nature of use tax must be clarified. Use tax and sales tax are complementary, designed to ensure that interstate or untaxed transactions bear the same tax burden as local taxable transactions. When a supplier does not collect sales tax, the buyer has a legal obligation to self-assess and pay use tax. Failure to pay use tax, even with records of some sales tax paid, does not offset or exempt the tax obligation on other purchases. If goods involved in research and development projects fall within an exemption (such as certain equipment or materials used for R&D), the business should apply for a refund through proper channels, rather than using them as "leverage" in future audits.

Second, the core issue with the CPA's advice lies in confusing the legal consequences of "tax paid" versus "tax not paid." In a sales tax audit, tax authorities typically focus on whether the business has correctly reported and paid all taxable purchases. If a large amount of unpaid use tax is found, the business may face additional tax, interest, and penalties. Sales tax paid on research and development projects, even if overpaid, cannot automatically offset other unpaid taxes; tax authorities may require the business to first pay the unpaid portion and then separately apply for a refund. Using paid taxes as "leverage" to offset or reduce unpaid liabilities lacks legal basis and may raise auditors' concerns about the business's tax compliance.

Furthermore, New York State tax procedures are clear: for purchases that should not be subject to sales tax, businesses should file Form AU11 to apply for a refund, rather than deciding on their own not to pay or delaying payment. If a business fails to timely report use tax, the audit lookback period is generally three years, but in cases of non-filing or fraud, it can be extended to six years or longer. Therefore, relying on "receipt retention" as a defensive strategy not only fails to eliminate risk but may also extend the audit window due to non-reporting.

From a professional perspective, the CPA's advice has clear flaws. The compliant approach should be: first, systematically review all purchases where sales tax was not directly collected to assess whether they are taxable; second, for taxable purchases, immediately pay and report use tax; third, for research and development purchases that are indeed exempt, file AU11 to apply for a refund as required, rather than keeping receipts and waiting for an audit. The business should seek a second opinion from a tax attorney or specialized tax advisor to correct the current practice of non-payment.

In summary, the CPA's advice is not reliable. The business should face its use tax compliance obligations, proactively correct the non-payment behavior, and avoid greater tax risks from improperly relying on a "leverage" strategy. In tax matters, preventive compliance is far better than after-the-fact remediation.