Trying to enter my spouse's 1099-MISC. It won't let me.

If the income on the 1099-MISC is for non-employee compensation, it should have been reported on Form 1099-NEC.  Beginning in 2020, the IRS has changed the method of reporting non-employee compensation, which used to be reported in Box 7 of the 1099-MISC.  Non-employee compensation is now reported on Form 1099-NEC.  

To enter the income on the 1099-MISC your spouse received:

1. Click Wages & Income
2. Under the Self-Employment section, click the Start/Revisit box next to Self-employment income and expenses.
3. Click the box Add Income for this work.
4. On the screen, Let's enter the income for your [XX] work, mark the radio button for Form 1099-NEC
5. On the next screen, OK, let’s get some details from your 1099-NEC enter the amount from box 7 of the 1099-MISC in Box 1 of Form 1099-NEC.

If you are still having difficulty, please respond to this thread with the details of what you are experiencing.