Receiving donations that will be sent on to charity - how do I track it

There are a number of ways you may keep track of the donations that will be sent on to a charity at the end of the year.  One of the simplest is to enter each deposit transaction you will be donating in the main account with a category (or tag) for the organization.  To view the amount to be donated at the end of the year, you may use a customized report that includes the year's transactions in the main account with the category (or tag) you chose to use for the organization.

If these individual donations are checks being aggregated at deposit into a single deposit transaction, enter the individual checks in a holding account when you receive them and use a transfer transaction from the holding account to the main account to record the aggregated deposit.  The holding account is an offline Cash account whose running balance should be zero when the checks have actually been deposited into the main account.  The donation deposits into the holding account would be made with the category (or tag) for the organization and the holding account included in the customized report.