sharing sales invoice income across several months.

I've got a way you might consider doing, kline.

QuickBooks Online has a Progress invoicing feature that lets you split into as many invoices as needed. You'll have to turn this feature on. I'll show you how:

1. Go to Settings and select Account and Settings.
2. Select the Sales tab.
3. In the Progress Invoicing section, select Edit ✎.
4. Select the Create multiple partial invoices from a single estimate checkbox.
5. Select Save and Done.

Once done, you can now create multiple invoices. To learn more details about the process, please check this article: Set up and send progress invoices in QuickBooks Online.

Know that I'm always here to guide you if there's something else you need help on this process. 

Hi kline, thanks for getting back to us. When you raise an invoice on an accrual basis, the income will post to the reports such as the P&L on the invoice date, therefore as a lump sum rather than split between the individual months of payment. Are the monthly management accounts set up as income accounts within the Chart of Accounts?

Can we also check if the invoice itself paid for by the customer in full at the start of the year when the invoice is issued, or do they pay in installments? 

Thanks!