QB Issue Resolution:

if you mean the customer is paying a lump sum for several invoices

receive payment on each invoice, until the total amount received = the lump sum payment

QB does not care if one check covers several invoices

Resolution for Issue 'reconciling lump sum as individual payments.' available: Yes (Solved).
Source: Intuit Community forum.

reconciling lump sum as individual payments.: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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