Deductions & credits

Here's what TT says:

You can file as Head of Household if either SITUATION A or SITUATION B described below applies to you.

You provide a home for certain other persons, you were unmarried or legally separated as of December 31, 2020, and ONE of the following was true:

1. You paid over half the cost of keeping up a home that was the main home...

2. You paid over half the cost of keeping up a home in which you lived and in which one of the following also lived for more than half of the year:

(a) Your UNMARRIED child, adopted child, grandchild, great-grandchild, or stepchild. This child does not have to be your dependent.

TT won't let me claim HofHH for this situation.  I need help!!!