I paid for TurboTax for 2018, and cannot file because have an identity number from the IRS. filed, it was rejected -did not allow me to put my #

To enter your identity protection PIN in TurboTax Online, click the Search button at the top and enter "ip pin" (without the quotes) in the search box, then click the magnifying glass. This will bring up a box that says "Do you need an IP PIN?" Scroll that box down just a bit and click the button that says "Go to IP PIN."