Deductions & credits

@CatinaT1  Hello - as an expert can you address a question that i cant find an answer to anywhere: Im a W2 employee, forced to work from home for covid in 2021.   regarding my NY state return, Id like to claim a home office deduction but only expense is the rent i pay ($6000/ month for a Manhattan apartment).  Am i allowed to deduce as a home office expense the apportioned rent (eg 1/4 of the rent since the spare room now converted into an office is 1/4 of the apartment).  Of course before covid I already paid rent so am concerned this is not allowed .  Please let me know