Business & farm

I couldn't find any option for HY, MQ, etc.

I wasn't thinking it thru when I first asked so it isn't really an issue with at this point.  However, it is not calculating right.  1st year was 22. , mid quarter 2.  Cost was $65,150.  Total depreciation prior to 25 is $34,204.  25 depreciation should be $13,030 (20%) but TT is making it $12,378 (18.9%).  I don't like to override but it is looking like the only option?  Any other way to fix this?