Received Too Much from Social Security

I worked a portion of 2019, and then retired.   I was informed by Social Security this year (2020), that they overpaid me last year in Social Security Benefits, and I must pay back approximately $9000. 

 

1.  Because both my wife and I worked last year, I had to pay taxes on our combined income, which included all of my Social Security earnings (including the $9000 that I was overpaid).   

2.  If I pay back the $9000 this year to Social Security, it would appear that my income for tax year 2019 was overstated by that amount.   

 

I am thinking that I am due a refund of some portion of the taxes I paid in 2019.   Do I have to re-state my 2019 taxes, or can I somehow deduct that $9000 from my 2020 tax year earnings?