Someone used my SSN and tried to apply for a credit card and to open a bank account, the bank called me and I locked my credit, do I need to report it to IRS?

Is it mandatory? Do I have an obligation to do report this to the IRS? They are asking for my phone number and the best time to call me and I don't really want to do all that thing with the IRS unless it is mandatory. My credit with the bureaus is already locked.