The Taxpayer Advocate Service (TAS) can help taxpayers with what type of assistance? As a first step, rather than dealing with the IRS, when the taxpayer believes there are unusual circumstances involved. When the taxpayer feels the resolution applied by the IRS is unreasonable. If there is a financial difficulty, emergency, or hardship and the IRS needs to move faster than normal. When an audit results in a significant change and the deadline for appeal has passed