If i’m filing single can I claim head of household

If you do not have a qualified person as a dependent you are not eligible for Head of Household.

See this - https://ttlc.intuit.com/community/family/help/do-i-qualify-for-head-of-household/01/25539

if you don't have an eligible dependent then you can't file as HOH

if oyu did then you must have paid more than 1/2 the cost of keeping up a home lived in for more than 6 months by the eligible dependent

a qualifying dependent includes any of the following

qualifying child (but not if your not the custodial parent) or

parent - you must have provided over 1/2 their support, there gross income for 2020 must be less tan $4300 (social security doesn't count) and if they did not live with you you must must have paid more than 1/2 the cost of keeping up the parent's home or

qualifying relative but this excludes unrelated individuals and individuals treated as a qualifying relative only because of a multiple support agreement