Deductions & credits

Never mind about the query and confusion I posted earlier as I re-run my 2019 tax again without entering the Roth IRA contribution, I still get the same AGI and Tax I have to pay.  I also found Schwab provided the Form 5498 listing my Roth contribution to IRS, which makes sense I don't have to report on my return. I have several questions that need help.  I go this one first.

My 2019  AGI was  $176,510, $510 more than the threshold  to pay $148.50 Medicare Premium. Now it costs us $59.40 more each  and that translates into $1425/year.  2020 is the first year I have to pay for Medicare Premium because I retired in12/2020 my wife retired 5 years ago.   I made a mistake in 2019 by having my wife withdrew $45,000 from her 401K.   Is there a way, I can still reduce my 2019 AGI by $510: say return $1000 that my wife withdrew from her 401K or donate $520 to charity and then amend my 2019 return?  Your advise will help.