Many small businesses do not require an EIN. If you do not have employees or have not needed to apply for an EIN for banking purposes, don't worry. Skip the EIN field. Do not try to fill in your SSN; that is already in your tax return.
It is hard to tell where you are having difficulty and being asked to enter an EIN number, so here is an answer that may be helpful based of seeing similar questions. If it does not help, please add more details.
If you had self-employment income from last year, a blank Form 1099-NEC may have been imported in anticipation of you needing to fill it out this year.
Try using the following steps to delete any unused Form 1099-NEC that you see:
This will bring you to the summary of all Form 1099-NEC that you have entered. Click Delete or the trash can icon next to each one.