What was the offset for the journal entry recording the donation in the books/on the Trial Balance?

You still haven't answered my question.   Once you do, you'll know what to 'offset' to get the balance sheet to balance - altho @sjrcpa has an excellent point, now that you've provided more info.

Are you a tax pro?  Do you understand double entry bookkeeping?   If not, then you are in over your head & should find  professional assistance with this.   If you are, you need to find a mentor.