The IRS says "usually it takes 7 weeks" however this is NOT a usual year ... expect it to take much longer. Hopefully you sent the correct paperwork to the correct address and attached a copy of the federal return to it.
https://www.irs.gov/individuals/how-do-i-apply-for-an-itin
If you mailed the ITIN application with the tax return directly to the IRS then you will be waiting a long long time until they forward the package to the correct place (if they do it at all ... they may mail it back to you).
