When running an Income Report, it would be much more useful to have the payments posted in the month of payment as opposed to the month of the invoice. Accrual accounting isn't all that useful for a non-profit on an ongoing basis. It also makes reconciling bank account records impossible. Alternatively, if the level of detail (summary breakdown of payment allocation, i.e. membership, events, store orders) was available on the Payments Report, that would alternatively work.