How should I split a home improvement (crawlspace encapsulation) between business and personal since part of business is ran from home?

You can split transactions when categorizing them, Everythingtreestn. Let me fill you in with details regarding this topic.

When dividing your home improvement expenses between business and personal in QuickBooks Self-Employed (QBSE), you can split them by amount or percentage when categorizing them. You can also separate business transactions into different Schedule C expense categories. You can refer to this material for more information when performing process: Split transactions in QuickBooks Self-Employed.

That said, I recommend consulting your accountant for proper recording, as it involves configuring your books. If you don't have one, I can help you find an accountant. Visit this page to find one for your business: Find a QuickBooks ProAdvisor.

Additionally, here’s a resource to guide you in recording transactions in Schedule C on QBSE: Categorize transactions in QuickBooks Self-Employed.

Circle back on this thread if you have additional questions about splitting your QBSE transaction. I'll be here to assist you any time.