See When will I get my IRS tax refund? (intuit.com)
Did you use receive an IRS notice 5071C and use the website to verify your identity?
See this IRS website for information -https://www.irs.gov/uac/newsroom/taxpayers-receiving-identity-verification-letter-should-use-idverif...
IRS website for Letter 5071C - https://www.irs.gov/individuals/employees/understanding-your-5071c-letter
