How can I change my principal business code on Schedule C on TT Online? The current code is not valid on IRS's classification anymore and I need to change it .

I'd like to change it to 454110 (Electronic shopping and mail-order houses) but the current view on my screen  somehow shows 454111 which is non-existent on IRS's Principal Business or Professional Activity Codes. There is no edit button and I don't know how to correct it.
Thanks.