Fight Back Against Tax ID Fraud

I’m writing a piece for Experian on how tax ID theft is on the rise this year and the IRS is getting aggressive about issuing warnings to Americans. I need help gauging the threat level of tax ID theft in 2018, and what taxpayers can do to mitigate or eliminate tax fraud. In short, what is it, how threatening is it, and what can Americans do to fight back against tax ID fraud?