Why won't it accept my principle business code. It is a valid one 454110.

[boosaige]

Trying to fill out a 1099 for Poshmark.

[rjs]

Code 454110 is no longer valid. It was eliminated in 2022. The IRS instructions for Schedule C now say "For nonstore retailers, select the [Principal Business Activity] code by the primary product that your establishment sells." For Poshmark sales I would suggest code 458110, Clothing & clothing accessories retailers.