Why am I being penalized for over-contribution to my Roth IRA when my AGI is below $124,000 on my 1040?

I earned unemployment and with that plus my W2 wages, I was over the $124,000.  But with the new stimulus bill, up to $10,200 is exempt from Federal tax.  So my AGI is under $124,000, but when I add my Roth IRA contribution, it tells me that my MAGI (which is the same as my AGI) is over $124,000 and I'm having to pay tax on the amount above $124K, but my MAGI is not above $124K.  I should be allowed the entire Roth contribution limit with no penalty.  How do I fix my return so I am not penalized?