I look after the finances for a church, if there are funds in a specific CLASS, how do I move it to another CLASS correctly so that revenue/expenses are not affected?

There is money in CLASS: OLD - $1,500 based on the balance report ending December 31. I want to move the $1,500 to CLASS: NEW (which currently has a balance of $2,000. So the total, after the transfer would be $3,500 in CLASS: NEW and $0 in CLASS: OLD. I can't go back and reclassify the deposits into CLASS: OLD because they're from 2022 and the financial statement is completed and that would be affected. I'm not sure how to transfer the funds without it affecting the Revenue/expenses. I created a CLEARING/WASH account - but was not sure how to properly use it as a journal entry. 

I have looked at old posts - but nothing was recent and a lot of people had issues with this in the last few years. Has QuickBooks Online provided us with a method to do this? Thanks.