After you file

to clarify  when you say" in the boxes"  you would be referring to Box11(A) and or any of the boxes under PartIII 

Received K-1 with 2a ordinary dividends 21,147

Box 11  inform  with deductions in excess of income by 68,276

This addition deduction is not going to make any difference on 1040-SR 

Her income is 22,000 and deductions already 68,000 

I read that is adding the K-1 did not change the outcome, I do not need to send an addendum.

Is this true? 

Do i need to reopen the filing and see what the results would be if I did add the k-1?

If so how would I do that?