RSUs and Adjusted Cost Basis

[SeeCandyRun]

My husband receives RSUs from his company. In 2020, we sold more of that stock than we normally do. When I was filing our taxes, I came upon the question/flags about entering my Adjusted Cost Basis for each sale. I do not ever recall getting this prompt in the past. 

I pulled out the ETrade records and started entering the Adjusted Cost Basis (the Cost Basis had been recorded as $0.00. With each entry, my liability decreased dramatically. When I was done, I owed 79% less than when I started. In an excited panic, I hurried to purchase the larger TT support package. And then I just filed-- which meant that I am no longer eligible for the help I had just paid for. So here I am-- asking the community-- did I totally screw up or did I do it correctly? 

[Rick19744]

Probably best if you provided additional information / clarifications:

• Have you already filed your tax return?
• Did you use "0" as the cost basis?
• Do you understand your actual cost basis?  This should have been included in your husband's W-2 in the year the units vested.
• How long were the units held?

[SeeCandyRun]

Hi Rick,

Thank you for replying! 

Here is more information:

• Have you already filed your tax return?
  • Yes-- I totally jumped the gun 😬
• Did you use "0" as the cost basis?
  • Yes and then when prompted to find and enter the adjusted cost basis, I did that.
• Do you understand your actual cost basis?  This should have been included in your husband's W-2 in the year the units vested. 
  
  • The cost basis on all on ETrade shows as $0.00
• How long were the units held?
  • All of these were acquired and sold in 2020

[SeeCandyRun]

I'm not sure if this detail is useful, but the numbers in these 2 columns matched: Adjustment Amount (Ordinary Income) &  Adjusted Cost Basis.

I appreciate any more feedback that you have and am fully aware that the feedback is anecdotal and not professional consultation.