trust interest and rental income distributions

I'm preparing a 1041 for a trust in TT business and confused.  Total income is 10,325  (10324 in rental real estate income and $1 interest) income.  Three beneficiaries.  I was using the K1 figures for the final distribution amounts made by the 65 day deadline and have now realized distributions were $1 (the interest) less than they should have been.  Are you just supposed to remember to add the interest to any other income and THEN make the final distribution? It seems to me the software ought to make this clearer.  The K1 worksheet doesn't provide a TOTAL for each beneficiary of all income.

 

I have no idea what to do with the $1.00.  Does it just stays as corpus in the checking account?  Or add it to the next year (2022) distributions?