You can pay multiple invoices from a single vendor, @DDSElectric.

If you're using an Essentials, Plus, or Advanced QBO plan, you can separately enter the bills (invoices) you received. Then, use the Pay bills feature to pay them all at once. This action will only generate one check since the bills belong to one vendor.

For more information, you may also check out this article: Enter bills and record bill payments in QuickBooks Online.

For the Simple Start subscription, you can simply write a check and enter multiple expense line items that represent the bills. Then, insert the invoice number in the Description field of each item, so they'll show up when you print the check.

For your additional reference, you may consider reading this article: Create and record checks in QuickBooks Online.

Additionally, I'll be adding this resource to guide you on how to enter, upload, and track expense receipts and bills: Capture and categorize expense receipts and bills in QuickBooks Online.

I'm just around if you have other questions about your vendor transactions in QuickBooks. I'll be happy to help you more. Thank you and keep safe.