Most minor children don't have to file taxes at all, but if they have income from a job or from investments held in their name, then it's possible that they will need to file. If so, they typically aren't allowed to claim the full standard deduction. Instead, they're subject to reduced standard deductions. For them, a standard deduction of at least $1,100 is available. Those who have earned income from a job or other source get a standard deduction of at least their total earned income plus $350 more, until that amount rises above the regular standard deduction shown in the table above. These numbers are the same for 2020 as they were in 2019.
Accounting firms grew in the United States and Europe in the late nineteenth and early twentieth century, and through several mergers there were large international accounting firms by the mid-twentieth century. Further large mergers in the late twentieth century led to the dominance of the auditing market by the "Big Five" accounting firms: Arthur Andersen, Deloitte, Ernst & Young, KPMG and PricewaterhouseCoopers.[48] The demise of Arthur Andersen following the Enron scandal reduced the Big Five to the Big Four.[49]
For example, if an investor in a 25% tax bracket had $10,000 in long-term capital gains, there would be a tax liability of $1,500. If the same investor sold underperforming investments carrying $10,000 in long-term capital losses, the losses would offset the gains, resulting in a tax liability of 0. If the same losing investment were brought back, then a minimum of 30 days would have to pass to avoid incurring a wash sale. 
Accounting is the process of recording financial transactions pertaining to a business. The accounting process includes summarizing, analyzing and reporting these transactions to oversight agencies, regulators and tax collection entities. The financial statements used in accounting are a concise summary of financial transactions over an accounting period, summarizing a company's operations, financial position and cash flows.