I’m filing my taxes and I filed single and it’s asking for my spouse information why?

There is no reason to enter any spouse information. Be sure you have selected single as your filing status and that you were not married in 2020 in the 'Personal Info' section.

If you are entering a Form 1099-NEC, I suggest deleting that and enter only the total income from Box 1. You can choose to enter this as a cash payment of business income by selecting Other self-employed income, includes 1099-K, cash, and checks (if you choose this, delete the 1099-NEC).  See the image below.

The entry is for convenience, but it is not required. The IRS has a copy from the payer of the income. Keep the form with your tax records.