Yes it is true that the IRS requires you to use the highest deduction whether it be Standard or Itemized. The only time taking a lower deduction instead of the higher is in cases when filling status is MFS and one spouse itemizes forcing the other to do so. This resource gives you a link to the Standard vs. Itemize calculator which can help you determine which one you are eligible for.
https://blog.turbotax.intuit.com/tax-deductions-and-credits-2/standard-vs-itemized-tax-deductions-ca...
