Retirement tax questions

Thanks for the response.  I been told that the 6 month lookback rule only applies if my current employer does not provide the same coverage as Part B and Part D Medicare plans . (Employer  does not provide the same type of coverages in their High deductible plans for employees 65 and older.  Mine does)   So the reasoning I'm told is that if I turn 65 in Feb,  Then apply for Medicare in July, I would be able to contribute for the first 6 months of 2022 (only 6 months worth).   Is this correct?